From 59f60f39f644f0f2fcf7ded2955e0ff88de7bed0 Mon Sep 17 00:00:00 2001 From: Dirk Hohndel Date: Thu, 13 Feb 2014 22:41:36 -0800 Subject: Updated user manual html file Signed-off-by: Dirk Hohndel --- Documentation/user-manual.html.git | 1481 +++++++++++++++++++++--------------- 1 file changed, 850 insertions(+), 631 deletions(-) (limited to 'Documentation') diff --git a/Documentation/user-manual.html.git b/Documentation/user-manual.html.git index 6da2f5429..9da673406 100644 --- a/Documentation/user-manual.html.git +++ b/Documentation/user-manual.html.git @@ -408,15 +408,17 @@ asciidoc.install(3);

USER MANUAL

-

Manual authors: Jacco van Koll, Dirk Hohndel, Reinout Hoornweg, Linus Torvalds, +

Manual authors: Jacco van Koll, Dirk Hohndel, Reinout Hoornweg, Linus +Torvalds, Miika Turkia, Amit Chaudhuri, Jan Schubert, Willem Ferguson, Salvador Cuñat

Version 4.0.1, January 2014

Welcome as a user of Subsurface, an advanced dive logging programme with -extensive infrastructure to describe, organise and interpret scuba and free dives. +extensive infrastructure to describe, organise, interpret and print scuba +and free dives. Subsurface binaries are available for Windows PCs (Win XP or later), Intel based Macs (OS/X) and many Linux distributions. Subsurface can be built for -many more hardware platforms and software environments where Qt and libdivecomputer -are available.

+many more hardware platforms and software environments where Qt and +libdivecomputer are available.

The scope of this document is the use of the Subsurface program. To install the software, consult the Downloads page on the Subsurface web site. @@ -436,21 +438,21 @@ Divers

The Subsurface window is usually divided into four panels and has a Main Menu (File Import Log View Filter Help) at the top of the window (for Windows -and Linux) or the top of the screen (for Mac and Ubuntu Unity). The screen shots -in this manual were taken on an Ubuntu system, so they don’t show the main menu -as part of the Subsurface window. The four panels are:

-

1) The Dive List to the bottom left containing a list of all the dives in your -dive log. You can select and highlight a dive on the dive list by clicking on -it. In most situations you can also use the cursor up/down keys to switch +and Linux) or the top of the screen (for Mac and Ubuntu Unity). The four panels are:

+

1) The Dive List to the bottom left containing a list of all the dives in the +user’s +dive log. A dive can be selected and highlighted on the dive list by clicking on +it. In most situations the cursor up/down keys can be used to switch between dives.

-

2) The Dive Map to the bottom right, showing your dive sites on a world map +

2) The Dive Map to the bottom right, showing the user’s dive sites on a world +map and centred on the site of the last selected dive.

3) The Dive Info to the top left, giving more detailed information on the selected dive, including some statistics for the selected dive or for all highlighted dive(s).

-

4) The Dive Profile to the top right, showing a graphical profile of the +

4) The Dive Profile to the top right, showing a graphical dive profile of the highlighted dive in the dive list.

-

You can drag the dividers between panels in order to change the size of any of +

The dividers can be dragged between panels in order to change the size of any of the panels. Subsurface remembers the position of the dividers, so the next time Subsurface starts it uses the positions of the dividers when the program was executed previously.

@@ -458,14 +460,15 @@ was executed previously.

the selected dive are shown in the respective panels. On the other hand, if one highlights more than one dive the last highlighted dive is the selected dive, but summary data of all highlighted dives is shown in the Stats tab -of the Dive Info panel.

+of the Dive Info panel (maximum, minimum and average depths, durations, water +temperatures and SAC; total time and number of dives selected).

The Main Window
-

You can determine which of the four panels you wish to see by selecting the -View option on the main menu and which gives the user several choices of +

The user can determine which of the four panels are displayed by selecting the +View option on the main menu. This option gives the user several choices of display:

All: show all four of the panels as in the screenshot above.

Divelist: Show only the Dive List.

@@ -474,28 +477,29 @@ display:

all highlighted dives.

Globe: Show only the world map, centred on the last selected dive.

Like many other functions that can be accessed via the Main Menu, these options -can be triggered using keyboard shortcuts as well. The shortcuts for your system +can be triggered using keyboard shortcuts as well. The shortcuts for a +particular system are shown with an underline in the menu entries. Since different Operating -Systems and your chosen language may cause Subsurface to use different -shortcut keys we won’t try to list them here in the user manual.

-

When you start the program for the first time, it shows no information at all. +Systems and the user chosen language may cause Subsurface to use different +shortcut keys they will not be listed here in the user manual.

+

When the program is started for the first time, it shows no information at all. This is because the program doesn’t have any dive information available. In the -following sections we will describe how to create a new logbook.

+following sections, the procedures to create a new logbook will be described.

2. Creating a new logbook

Select File → New Logbook from the main menu. All existing dive data are -cleared so that new information can be added. If there is unsaved data in an open -logbook, Subsurface will ask you if you want to save the open logbook before -a new logbook is created.

+cleared so that new information can be added. If there is unsaved data in an +open logbook, Subsurface the user will be asked if the open logbook will be +saved before a new logbook is created.

-

3. How to obtain dive information to store in your logbook

+

3. How to obtain dive information to store in the user’s logbook

-

There are several ways to add dive information to your logbook:

+

There are several ways in which dive information can be added to a logbook:

  1. @@ -508,7 +512,8 @@ use a dive computer and dives were recorded in a written logbook. Import dive information directly from a dive computer if it is supported by Subsurface. The latest list of dive computers supported by Subsurface can be found at: -Supported dive computers. + +Supported dive computers.

  2. @@ -522,15 +527,16 @@ discussed in more detail below.

    3.1. Entering dive information by hand

    This is usually the approach for dives without a dive computer. The basic record of information within Subsurface is a dive. The most important information -in a simple written dive logbook usually includes dive type, date, time, -duration, depth, the names of your dive buddy and of the dive master or dive guide, -and some remarks about the dive. Subsurface can store much more information -than this for each dive. In order to add a dive to your dive log, select Log +in a simple dive logbook usually includes dive type, date, time, duration, +depth, the names of your dive buddy and of the dive master or dive guide, and +some remarks about the dive. Subsurface can store much more information +than this for each dive. In order to add a dive to a dive log, select Log → Add Dive from the Main Menu. The program then shows three panels to enter information for a dive: two tabs in the Info panel (Dive Notes and -Equipment), as well as the profile panel that displays a graphical profile of -each dive. These panels are respectively marked A, B and C -in the figure below. We will now consider each of the tabs used for data entry.

    +Equipment), as well as the profile panel that displays a graphical profile +of each dive. These panels are respectively marked A, B and +C +in the figure below. Each of these tabs will now be explained for data entry.

FIGURE: Add dive @@ -541,49 +547,53 @@ in the figure below. We will now consider each of the tabs used for data entry.<

This panel contains the date, time and place information for a particular dive, environmental conditions, co-divers and buddies, as well as some descriptive information. The message in a blue box at the top of the panel indicates that -you are in the process of adding information about your dive. If you click on -the Dive Notes tab, the following fields are visible:

+the dive is being edited. If one clicks on the Dive Notes tab, the following +fields are visible:

FIGURE: The Dive Notes tab

The Starttime field reflects the date and the time of the dive. By clicking -the down-arrow on the right of that field you can display a calendar from which -you can choose the correct date. The hour and minutes values can also be edited -by clicking on each of them in the text box and by overtyping the information -displayed.

-

Air and water temperatures: Type in the air and water temperatures during the -dive into these fields to the right of the Starttime. You do not need to type -in units of temperature: Subsurface supplies these automatically, you only need -type the number. (The units selected in the Preferences -will determine whether metric or imperial units are displayed)

-

Location: Here you enter the name of the dive site, e.g. "Tihany, Lake Balaton, -Hungary". Auto completion of location names will make this easier when you -frequently dive at the same sites.

+the down-arrow on the right of that field a calendar will be displayed from +which +one can choose the correct date. The time values (hour and minutes) can also be +edited directly by clicking on each of them in the text box and by overtyping the +information displayed.

+

Air and water temperatures: the air and water temperatures during the +dive can be typed directly on the fields to the right of the Starttime. +Temperature units are not needed, as they will be automatically supplied by +Subsurface. Only the numerical value must be +typed by the user (The units selected in the Preferences +will determine whether metric or imperial units are used).

+

Location: Here the name of the dive site can be entered, e.g. "Tihany, Lake +Balaton, +Hungary". Auto completion of location names will make this easier if one +frequently dives at the same sites.

Coordinates: The geographic coordinates of the dive site should be entered here. These can come from three sources:

  1. -You can find the coordinates on the world map in the bottom right hand part +One can find the coordinates on the world map in the bottom right hand +part of the Subsurface window. The map displays a green bar indicating "No location -data - move the map and double-click to set the location". Upon a double-click +data - Move the map double-click to set the location". Upon a double-click at the appropriate place, the green bar disappears and the coordinates are stored.

  2. -You can obtain the coordinates from the Subsurface Companion app if you -have an Android device with GPS and you stored the coordinates of the dive site -using that device. +The coordinates can be obtained from the Subsurface Companion app if the +user has an Android device with GPS and if the coordinates of the dive site +were stored using that device. Click here for more information

  3. -One can enter the coordinates by hand if they are known, using one of +The coordinates can be entered by hand if they are known, using one of four formats with latitude followed by longitude:

    @@ -595,26 +605,29 @@ Decimal degrees, e.g. 30.22496 , 30.821798
-

Southern hemisphere latitudes are given with a S, e.g. S30°, or with a negative -value, e.g. -30.22496

-

Divemaster: Enter the name of the dive master or dive guide for this dive. -Again, this field offers auto completion based on the list of dive masters in the -current logbook.

-

Buddy: Enter the name(s) of the buddy / buddies who accompanied you on the -dive. Auto completion based on the list of buddies in the current logbook is -offered.

-

Suit: Enter the type of diving suit you used for the dive. Just as with the -other items auto completion of the suit description is available.

-

Rating: Here you can provide a subjective overall rating of the dive on a -5-point scale by clicking the appropriate star on the rating scale.

-

Visibility: You can provide a rating of visibility during the dive on a -5-point scale by clicking the appropriate star.

-

Tags: You may enter tags here (separate them by commas) that describe the type -of dive you performed. Examples of common tags are boat, drift, training, cave -etc. Subsurface has many built-in tags. Auto completion is once again offered. -For instance, if you typed cav, then the tags cave and cavern are shown -for the user to choose from.

-

Notes: Type any additional information here.

+

Southern hemisphere latitudes are given with a S, e.g. S30°, or with a +negative value, e.g. -30.22496. Similarly western longitudes are given with a +W, e.g. W07°, or with a negative value, e.g. -7.34323.

+

Divemaster: The name of the dive master or dive guide for this dive can be +entered here. +Again, this field offers auto completion based on the list of dive masters in +the current logbook.

+

Buddy: In this field one can enter the name(s) of the buddy / buddies +(separated by commas) who accompanied the user on the dive. Auto completion +based on the list of buddies in the current logbook is offered.

+

Suit: The type of diving suit that was used for the dive can be entered here. +Just as with the +other items, auto completion of the suit description is available.

+

Rating: In this field, users can provide a subjective overall rating of the +dive on a 5-point scale by clicking the appropriate star on the rating scale.

+

Visibility: As with the previous item, users can provide a rating of +visibility during the dive on a 5-point scale by clicking the appropriate star.

+

Tags: Tags that describe the type of dive performed may +be entered here (separated by commas). Examples of common tags are boat, drift, +training, cave etc. Subsurface has many built-in tags. Auto completion is once again offered. +For instance, if, for instance, cav was typed, then the tags cave and cavern are +shown for the user to choose from.

+

Notes: Any additional information can be typed here.

The Save and Cancel buttons are used to save all the information for tabs in the info panel and in the dive profile panel, so there’s no need to use them until ALL other information has been added. Here is an example of a completed @@ -627,17 +640,18 @@ Dive Notes panel:

3.1.2. Equipment

-

The Equipment tab allows the user to enter information about the type of cylinder -and gas used, as well as the weights used for a dive. The message in a blue +

The Equipment tab allows the user to enter information about the type of +cylinder and gas used, as well as the weights used for a dive. The message in a +blue box at the top of the panel:

Blue edit bar
-

indicates that you are in the process of adding equipment information for the -dive. This is a highly interactive part of Subsurface and the information on -cylinders and gases (entered here) determines the behaviour of the dive profile +

indicates that the dive is being edited. This is a highly interactive part of +Subsurface and the information on +cylinders and gases (entered here) affects the behaviour of the dive profile (top right-hand panel).

Cylinders: The cylinder information is entered through a dialogue that looks like this:

@@ -646,93 +660,104 @@ like this:

FIGURE:Initial cylinder dialogue
-

The + button at the top right allows you to add more cylinders for this dive. -The dark dustbin icon on the left allows you to delete information for a -cylinder.

-

Start by selecting a cylinder type on the left-hand side of the table. To select -a cylinder click in the cylinder type box. This brings up a list button that can be -used to display a dropdown list of cylinders:

+

The + button at the top right allows the user to add more cylinders for this +dive. +The dark dustbin icon on the left allows one to delete information for a +particular cylinder.

+

The user starts by selecting a cylinder type on the left-hand side of the +table. To select a cylinder, the user must click in the cylinder type box. +This brings up a list button that can be used to display a dropdown list of +cylinders:

FIGURE:The cylinder drop-down list button
-

Use the drop-down list to select the cylinder type you used for this dive. The +

This drop-down list can then be used to select the cylinder type that was used +for this dive. The Size of the cylinder as well as its working pressure (WorkPress) will automatically be shown in the dialogue.

-

Now you need to indicate the starting pressure and the ending pressure of the -gas used during your dive. The unit of pressure (metric/imperial) corresponds -to the setting you chose in the preferences.

-

Finally you need to type in the gas mixture that you used. If you used air, you -can enter 21% or leave the field blank. If you used nitrox or trimix, specify -the percentage of oxygen and the percentage of helium. Leave any inappropriate -fields empty. After typing the information for the cylinder then -either press ENTER on the keyboard or click outside the cell that contains -the cursor. Add information for any additional cylinders by using the + button -at the top right hand. Here is an example of a complete description for a -dive using two cylinders (air and EAN50):

+

Next, the user must indicate the starting pressure and the ending pressure of +the +gas used during the dive. The unit of pressure (metric/imperial) corresponds +to the setting in the preferences.

+

Finally, the user should type in the gas mixture used. If air +was used, a value of 21% can be entered on this field, or the field might be +left blank. If nitrox or trimix were used, their percentages of oxygen and/or +helium must be specified. +Any inappropriate fields should be left empty. After typing the information for +the cylinder, press ENTER on the keyboard or click +outside the cell that contains the cursor. Information for any additional +cylinders can be added by using the + button at the top right hand. Following +is an example of a complete description for a +dive made using two cylinders (air and EAN50):

FIGURE: a completed cylinder dive information table

Weights: Information about the weight system used during a dive can be entered -using a dialogue very similar to that of the cylinder information. If you -click the + button on the top right of the weights dialogue, the table looks like -this:

+using a dialogue very similar to that of the cylinder information. If the user +clicks the + button on the top right of the weights dialogue, the table looks +like this:

FIGURE: The Weights dialogue
-

If you click on the Type field, a drop-down list becomes accessible through a -down-arrow:

+

If one then clicks on the Type field, a drop-down list becomes accessible +through a down-arrow:

FIGURE: Weights type drop-down list button
-

Use the drop-down list to select your type of weight system. In the Weight -field, type in the weight used during the dive. After typing the information -for the weight system either press ENTER on the keyboard or click outside the +

This drop-down list can then be used to select the type of weight system. In +the Weight +field, the weight used during the dive must be typed. After typing the +information +for the weight system the user must either press ENTER on the keyboard or +click outside the cell that contains the cursor. It is possible to enter information for more than one weight system by adding an additional system using -the + button on the top right hand. Weight systems can be deleted using the dustbin -icon on the left hand. Here is an example of information for a dive with two -types of weights: integrated and a weight belt:

+the + button on the top right hand. Weight systems can be deleted using the +dustbin icon on the left hand. Here is an example of information for a dive +with two types of weights: integrated and a weight belt:

FIGURE: A completed weights information table
-

You do NOT need to click the Save button before you have completed the dive -profile.

+

There’s NO need to click the Save button before the dive +profile has beeb completed.

3.1.3. Creating a Dive Profile

-

The Dive Profile (a graphical representation of the depth of your dive as a +

The Dive Profile (a graphical representation of the depth of the dive as a function of time) is indicated in the panel on the top right hand of the -Subsurface window. When you manually add a dive to your logbook, Subsurface -presents a default dive profile that you need to modify to best represent the dive -being described:

+Subsurface window. When a dive is manually added to a logbook, Subsurface +presents a default dive profile that needs to be modified to best represent the +dive being described:

FIGURE: Initial dive profile
-

Modifying the dive profile: When you move the cursor around the dive profile, +

Modifying the dive profile: When the cursor is moved around the dive profile, its position is indicated by two red lines as shown below. The depth and time that the cursor represents are indicated, respectively on the left hand and bottom axes. The units (metric/imperial) on the axes are determined by the preference settings. The dive profile itself comprises several line segments demarcated by waypoints (white dots on the profile, as shown -above). The default dive depth is 15m. -If your dive depth was 21m then you need to drag the appropriate waypoints -downwards to represent 21m. To add a waypoint, double-click on any line segment. +above). The default dive depth is 15 m. +If the dive depth was 21 m then the user needs to drag the appropriate waypoints +downwards to represent 21 m. To add a waypoint, double-click on +any line segment. To remove a waypoint, right-click on it and choose "Remove this point" from the -context menu. You will also need to drag the waypoints to represent an accurate -time duration for your dive. Below is a dive profile that represents a dive -to 21m for 31 min., followed by a 3 minute safety stop at 5m.

+context menu. The user will also need to drag the waypoints to represent an +accurate +time duration for the dive. Below is a dive profile that represents a dive +to 21 m for 31 min, followed by a 3 minute safety stop at 5 m.

FIGURE: Edited dive profile @@ -741,10 +766,11 @@ to 21m for 31 min., followed by a 3 minute safety stop at 5m.

Specifying the gas composition: The gas composition used is clearly indicated along the line segments of the dive profile. This defaults to the first gas mixture specified in the Equipment tab, which was air in the case of the -profile illustrated above. The gas mixtures of segments of the dive profile can be -edited. This is done by clicking on the gas description for a particular -waypoint and selecting the appropriate choice from the context menu. Changing the -gas for a waypoint affects the gas shown in the segment to the left of that +profile illustrated above. The gas mixtures of segments of the dive profile can +be edited. This is done by clicking on the particular +waypoint and selecting the appropriate gas from the context menu. Changing +the gas for a waypoint affects the gas shown in the segment to the left of +that waypoint. Note that only the gases defined in the Equipment tab appear in the context menu:

@@ -752,7 +778,7 @@ context menu:

FIGURE: Gas composition context menu
-

Below is the profile of a dive to 21m for 31 min. with a switch from air to +

Below is the profile of a dive to 21 m for 31 min with a switch from air to EAN40 on the ascent. In this case the first cylinder in the Equipment tab contained air and the second cylinder contained EAN40.

@@ -764,65 +790,77 @@ contained air and the second cylinder contained EAN40.

3.1.4. Saving the hand-entered dive information

The information entered in the Dive Notes tab, the Equipment tab as well as -the Dive Profile can now be saved in your logbook by using the two buttons -on the top right hand of the Dive Notes tab. If you click Save, the dive data -are saved in the current logbook. If you click Cancel, the newly entered -dive data are discarded. When you exit Subsurface it will prompt you to save -the logbook with the new dive(s) on your computer.

+the Dive Profile can now be saved in the user’s logbook by using the two +buttons +on the top right hand of the Dive Notes tab. If the Save button is clicked, +the dive data +are saved in the current logbook. If the Cancel button is clicked, the newly +entered +dive data are discarded. When exiting Subsurface the user will be prompted +once more to save the logbook with the new dive(s).

-

3.2. Importing new dive information from your Dive Computer

+

3.2. Importing new dive information from a Dive Computer

3.2.1. Connecting and importing data from a dive computer.

-

The use of dive computers allows collecting a large amount of information about -each dive, e.g. a detailed record of depth, durations, rates of ascent/descent +

The use of dive computers allows the collection of a large amount of +information about +each dive, e.g. a detailed record of depth, duration, rates of ascent/descent and of gas partial pressures. Subsurface can capture this information and -present it to you as part of the dive information. Subsurface can obtain dive +present it as part of the dive information, using dive information from a wide range of dive computers. The latest list of supported dive computers can be found at: -Supported dive computers.

+ +Supported dive computers.

+computers do not recharge through the USB connection. The users should refer to +the dive computer’s manual +if they are unsure whether the dive computer will recharge or drain its batteries +while connected to the USB port.
Warning Several dive computers consume more power when they are in their -PC-Communication mode. This could drain your battery. We therefore -recommend that you check if your dive computer is recharging when +PC-Communication mode. This could drain the dive computer’s battery. We +therefore +recommend that the user checks if the dive computer is charged when connected to the USB port of a PC. For example, several Suunto and Mares dive -computers do not recharge through the USB connection. Please consult the manual -of your dive computer if you are unsure if it will recharge or drain its -batteries while connected to the USB port.
-

To import dive information from a dive computer to your computer with Subsurface, -it is necessary that the two pieces of equipment must communicate. This +

To import dive information from a dive computer to a computer with +Subsurface, +it is necessary that the two pieces of equipment communicate with one another. +This involves setting up the communications port (or mount point) of the computer with Subsurface that communicates with the dive computer. In order to set up -this communication, you need to find the appropriate information to instruct +this communication, one needs to find the appropriate information to +instruct Subsurface where and how to import the dive information. Appendix A provides -the technical information to help you achieve this for different operating +the technical information to help the user achieving this for different +operating systems and Appendix B has dive computer specific information.

-

Now it is time to hook up your dive computer to your PC:

+

After this, the dive computer can be hooked up to the user’s PC, which can be +achieved by following these steps:

  • -Connect your interface cable to a free USB port (or set up the Infrared - or Bluetooth connection as described later in this manual) +The interface cable should be connected to a free USB port (or the Infrared + or Bluetooth connection set up as described later in this manual)

  • -Put your dive computer into PC Communication mode. - (You should consult the manual of your specific dive computer for -your brand and type) +The dive computer should be placed into PC Communication mode. + (Users should refer to the manual of their specific dive computer)

  • -In Subsurface, from the Main Menu, select Import → Import From Dive Computer. -Dialogue A inthe figure below appears: +In Subsurface, from the Main Menu, the user must select Import → Import +From Dive Computer. +Dialogue A in the figure below appears:

@@ -835,55 +873,63 @@ Dialogue A inthe figure below appears: though these dives have already been imported to Subsurface. For that reason Subsurface only imports dives that have not been uploaded before. This makes the download process faster on most dive computers and also saves battery power -of your dive computer (at least for those not charging while connected via USB). -If, for some reason, you wish to import ALL dives from the dive computer, -even though some may already be in the logbook, you can tick the box labeled -Force download of all dives.

+of the dive computer (at least for those not charging while connected via USB). +If, for some reason, the user wishes to import ALL dives from the dive computer, +even though some may already be in the logbook, then the the check box labeled +Force download of all dives can be ticked.

  • The dialogue has two drop-down lists, Vendor and Dive Computer. On the -vendor drop-down list select the make of your computer, e.g. Suunto, Oceanic, -Uwatec, Mares. On the Dive Computer drop-down list, select the model name of -your dive computer, e.g. D4 (Suunto), Veo200 (Oceanic), or Puck (Mares). +vendor drop-down list the user must select the make of the computer, e.g. +Suunto, Oceanic, +Uwatec, Mares. On the Dive Computer drop-down list, the model name of +the dive computer must be selected, e.g. D4 (Suunto), Veo200 (Oceanic), or Puck +(Mares).

  • The Device or Mount Point drop-down list contains the USB or Bluetooth port -name that Subsurface needs in order to communicate with your dive computer. -Select the appropriate port name. Consult Appendix A and Appendix B for -technical details to find the appropriate port information for your dive -computer and, in some cases, how to do the correct settings to the operating system -of your Subsurface computer. +name that Subsurface needs in order to communicate with the dive computer. +The appropriate port name must be selected. Consult Appendix A +and Appendix B for +technical details on how to find the appropriate port information for a +particular dive +computer and, in some cases, how to do the correct settings to the operating +system of the computer on which Subsurface is running.

  • -Click the OK button. Dialogue B in the figure above appears. +The OK button must then be clicked. Dialogue B in the figure above +appears.

  • -With communication established, watch how your data is retrieved from your -dive computer! -Depending on your make of computer and/or number of dives, this -could take some time. Please be patient. The Download dialogue shows a -progress bar at the bottom of the dialogue (but for some dive computers the -progress information could be inaccurate as we cannot determine how much downloadable -data there is until all data have been downloaded). When download of the dive information -is complete, all the imported dives appear -in the Dive List, sorted by date and time. Disconnect and switch off the dive +With communication established, one can see how the data is +retrieved from the +dive computer. +Depending on the make of the dive computer and/or number of recorded dives, this +could take some time. The user should be patient. The Download dialogue +shows a +progress bar at the bottom of the dialogue (for some dive computers the +progress information could be inaccurate as we cannot determine how much +downloadable data there is until all data have been downloaded). When the +download of the dive information is complete, all the imported dives appear +in the Dive List, sorted by date and time. One can then disconnect and +switch off the dive computer to conserve its battery power. -If you select a particular dive, the Dive Profile panel shows an informative +If a particular dive is selected, the Dive Profile panel shows an informative graph of dive depth against time for that particular dive.

  • -If there is a problem in communicating with your dive computer, an error +If there is a problem in communicating with the dive computer, an error message will be shown, similar to this text: "Unable to open /dev/ttyUSB0 Mares -(Puck Pro)", see the text in the box below. +(Puck Pro)". Refer to the text in the box below.

@@ -894,59 +940,62 @@ message will be shown, similar to this text: "Unable to open /dev/ttyUSB0 Mares Important -Check the following: 1) Is the dive computer still in PC-communication or Upload mode? -2) Is the battery of the dive computer fully charged? If not then charge or -replace the battery. -3) Is the cable faulty? Does the cable work perfectly using other software? Has -it worked before, or is this the first time you are using the cable? -4) Consult Appendix A and make sure you specified the correct Mount Point -(see above). -5) On Unix-like operating systems, do you have write permission to the USB port? If not, consult appendix A. +Check the following: 1) Is the dive computer still in PC-communication or +Upload mode? +2) Is the battery of the dive computer fully charged? If not then the battery +must be charged or replaced. +3) Is the connecting cable faulty? Does the cable work perfectly using other +software? Has it worked before, or is this the first time the cable is being used? +4) Consult Appendix A and make sure that the correct Mount Point +was specified (see above). +5) On Unix-like operating systems, does the user have write permission to the +USB port? If not, users should consult appendix A.
-

If your Subsurface computer does not recognise the USB adaptor by +

If the Subsurface computer does not recognise the USB adaptor by showing an appropriate device name next to the Mount Point, then there is a possibility that the cable or USB adaptor is faulty. A faulty cable is the most common cause of communication failure between dive computer and Subsurface -computer. It is also possible that your Subsurface computer is missing required -drivers to interact with the download cable and connected dive computer.

-

If all the above points are in order and there is a failure to download the dive data, -then perform a download with the following +computer. It is also possible that the Subsurface computer is missing + data, one should perform a download with the following two check boxes checked in the download dialogue discussed above:

Save libdivecomputer logfile
 Save libdivecomputer dumpfile
-

When checking each of these boxes, the user is prompted to select a folder to save -the file into. The default folder is the one in which the Subsurface dive log is -kept. After downloading, no dives are shown in the Dive List but two files are created -in the folder selected above:

+

When checking each of these boxes, the user is prompted to select a folder to +save the file into. The default folder is the one in which the Subsurface +dive log is kept. Important: After downloading, no dives are shown in the +Dive List but two files are created in the folder selected above:

subsurface.log
 subsurface.bin
-

Send these files to the Subsurface mail list: subsurface@hohndel.org and -request that the files be analysed, providing your dive computer make and model -as well as contextual information about the dives recorded on the dive -computer.

+

These files should be send to the Subsurface mail list: +subsurface@hohndel.org with a +request for the files to be analysed. One should provide the dive computer +make and model +as well as contextual information about the dives recorded on the dive computer.

-

3.2.2. Updating the dive information imported from your dive computer.

-

The information from your dive computer is not complete and you need to add more -details in order to have a more complete record of your dives. To do this, use +

3.2.2. Updating the dive information imported from the dive computer.

+

The information from the dive computer is not complete and more +details must be added in order to have a more complete record of the dives. To +do this, the Dive Notes and the Equipment tabs on the top left hand of the -Subsurface window.

+Subsurface window should be used.

3.2.3. Dive Notes

The date and time of the dive, gas mixture and perhaps water temperature is -shown as obtained from the dive computer, but you need to add some information by -hand in order for a more complete dive record. The message in a blue box at -the top of the panel indicates that you are in the process of adding information -about a dive. If you click on the Dive Notes tab, the following fields are +shown as obtained from the dive computer, but the user needs to add some +additional information by hand in order to have a more complete dive record. +The message in a blue box at +the top of the panel indicates that the dive is being edited. If the user +clicks on the Dive Notes tab, the following fields are visible:

@@ -954,74 +1003,88 @@ visible:

The Starttime field reflects the date and the time of the dive, as supplied by -the dive computer. It should therefore not be necessary to edit this, but you +the dive computer. It should therefore not be necessary to edit this, but one could make changes by clicking the down-arrow on the right of that field to -display a calendar from which you can choose the correct date. The hour and +display a calendar from which the correct date can be chosen. The hour and minutes values can also be edited by clicking on each of them in the text box and by overtyping the information displayed.

Air/water temperatures: Air and water temperatures during the dive are shown in these fields to the right of the Starttime. Many dive computers supply water -temperature information and this field may therefore not require editing. If -editing is required, you do not need to type in units of temperature: -Subsurface supplies these automatically, only a number is required. (The units -selected in the Preferences will determine whether metric -or imperial units are displayed)

-

Location: Here type in text that describes the site where you did this dive, -e.g. "Tihany, Lake Balaton, Hungary". Auto completion of location names will -make this easier when you frequently dive at the same sites.

+temperature information and this field may therefore not require further +editing. If +editing is required, only a value is required. The units of temperature will be +automatically supplied by +Subsurface (according to the Preferences, metric or imperial units will +be used).

+

Location: In this field one should type in text that describes the site +where the dive was performed, e.g. "Tihany, Lake Balaton, Hungary". the required drivers to interact with the download cable and connected dive +computer.

+

If all the above points are in order and there is a failure to download the +dive +Auto completion of location names will +make this easier when a user frequently dives at the same sites.

Coordinates: The geographic coordinates of the dive site should be entered here. These can come from three sources:

  1. -You can find the coordinates on the world map in the bottom right hand part +The user can find the coordinates on the world map in the bottom right hand +part of the Subsurface window. The map displays a green bar indicating "No location -data - move the map and double-click to set the location". Upon a double-click +data - move the map and double-click to set the location". Double-click at the appropriate place, the green bar disappears and the coordinates are stored.

  2. -You can obtain the coordinates from the Subsurface Companion app if you -have an Android device with GPS and you stored the coordinates of the dive site -using that device. +The user can obtain the coordinates from the Subsurface Companion app if +an Android device with GPS was used and the if the coordinates of the dive site +were stored using that device. Click here for more information

  3. -One can enter the coordinates by hand if they are known, using one of +The coordinates can be entered by hand if they are known, using one of three formats with latitude followed by longitude:

    -
    Degrees and decimal minutes, e.g: N30° 13.49760' , E30° 49.30788'
+
    ISO 6709 Annex D format e.g. 30°13'28.9"N 30°49'1.5"E
+Degrees and decimal minutes, e.g. N30° 13.49760' , E30° 49.30788'
 Degrees minutes seconds, e.g. N30° 13' 29.8" , E30° 49' 1.5"
 Decimal degrees, e.g. 30.22496 , 30.821798
-

Southern hemisphere latitudes are given with a S, e.g. S30°, or with a negative -value, e.g. -30.22496.

-

Divemaster: Enter the name of the dive master or dive guide for this dive. -Again, this field offers auto completion based on the list of dive masters in +

Southern hemisphere latitudes are given with a S, e.g. S30°, or with a +negative value, e.g. -30.22496. Similarly western longitudes are given with a +W, e.g. W07°, or with a negative value, e.g. -7.34323.

+

Divemaster: The name of the dive master or dive guide for this dive should be +entered in this field. +This field offers auto completion based on the list of dive masters in the current logbook.

-

Buddy: Enter the name(s) of the buddy / buddies who accompanied you on the +

Buddy: In this field, one enters the name(s) of the buddy / buddies +(separated with commas) who accompanied him/her on the dive. Auto completion based on the list of buddies in the current logbook is offered.

-

Suit: Enter the type of diving suit you used for the dive. Just as with the -other items auto completion of the suit description is available.

-

Rating: Here you can provide a subjective overall rating of the dive on a +

Suit: Here the type of diving suit used for the dive can be entered. +Auto completion of the suit description is available.

+

Rating: One can provide a subjective overall rating of the dive on a 5-point scale by clicking the appropriate star on the rating scale.

-

Visibility: You can provide a rating of visibility during the dive on a +

Visibility: Similarly, one can provide a rating of visibility during the +dive on a 5-point scale by clicking the appropriate star.

-

Tags: You may enter tags here (separate them by commas) that describe the type -of dive you performed. Examples of common tags are boat, drift, training, cave. -Subsurface has many built-in tags. If you start to type a tag, the program -will list the tags that correspond to your typing. For instance, if you typed +

Tags: Tags that describe the type of dive performed can be entered +here (separated by commas). Examples of common tags are boat, drift, training, +cave, etc. +Subsurface has many built-in tags. If the user starts typing a tag, the +program +will list the tags that correspond to the typing. For instance, if the user +typed cav, then the tags cave and cavern are shown for the user to choose from.

-

Notes: Type any additional information here.

+

Notes: Any additional information for the dive can be entered here.

The Save and Cancel buttons are used to save all the information for tabs in the info panel and in the dive profile panel, so there’s no need to use them until ALL other information has been added. Here is an example of a completed @@ -1034,16 +1097,16 @@ Dive Notes panel:

3.2.4. Equipment

-

The Equipment tab allows the user to enter information about the type of -cylinder and gas you used, as well as the weights used for that dive. The message -in a blue box at the top of the panel:

+

The Equipment tab allows one to enter information about the type of +cylinder and gas used as well as the weights used for the dive. The +message in a blue box at the top of the panel:

FIGURE: Blue edit bar
-

indicates that you are in the process of adding equipment information for the -dive. This is a highly interactive part of Subsurface and the information on +

indicates that the dive is being edited.This is a highly interactive part of +Subsurface and the information on cylinders and gases (entered here) determines the behaviour of the dive profile (top right-hand panel).

Cylinders: The cylinder information is entered through a dialogue that looks @@ -1054,38 +1117,43 @@ like this:

In most cases Subsurface obtains the gas used from the dive computer and -automatically inserts the gas composition(% oxygen) in the table. The + button at -the top right allows you to add more cylinders for this dive. The dark dustbin -icon on the left allows you to delete information for a cylinder.

-

Start by selecting a cylinder type on the left-hand side of the table. To select a -cylinder click in the cylinder type box. This brings up a list button that can be used -to display a dropdown list of cylinders:

+automatically inserts the gas composition(% oxygen) in the table. The + button +at the top right allows the user to add more cylinders for this dive. The dark +dustbin icon on the left allows the deletion of information for a cylinder.

+

The user should start by selecting a cylinder type on the left-hand side of the +table. To select a cylinder, the cylinder type box should be clicked. This +brings up a list button that can be used to display a dropdown list of +cylinders:

FIGURE: The cylinder drop-down list button
-

Use the drop-down list to select the cylinder type you used for this dive. The +

The drop-down list can then be used to select the cylinder type that was used +for this dive. The Size of the cylinder as well as its working pressure (WorkPress) will automatically be shown in the dialogue.

-

Now you need to indicate the starting pressure and the ending pressure of the -specified gas during your dive. The unit of pressure (metric/imperial) -corresponds to the setting you chose in the preferences.

-

Finally you need to type in the gas mixture that you used. If you used air, you -can enter 21% or leave the field blank. If you used nitrox or trimix, specify -the percentage of oxygen and the percentage of helium. Leave any inappropriate -fields empty. After typing the information for the cylinder -either press ENTER on the keyboard or click outside the cell that contains -the cursor. Add information for any additional cylinders by using the
-button at the top right hand. Here is an example of a complete description for a -dive using two cylinders (air and EAN40):

+

Next one must indicate the starting pressure and the ending pressure of the +specified gas during the dive. The unit of pressure (metric/imperial) +corresponds to the settings chosen in the preferences.

+

Finally, the user must type in the gas mixture used. If air was used, the +value of 21% can be entered here or this field can be left blank. If nitrox or +trimix were used, their percentages of oxygen and/or helium should be entered. +Any inappropriate fields should be left empty. After typing the +information for the cylinder, +either press ENTER on the keyboard or click outside the cell +that contains +the cursor. Information for any additional cylinders can be added by using the
+button at the top right hand. Following is an example of a complete description +for a dive using two cylinders (air and EAN40):

FIGURE: a completed cylinder dive information table
-

Weights: Information about the weight system used during a dive can be entered -using a dialogue very similar to that of the cylinder information. If you click +

Weights: Information about the weight system used can be entered +using a dialogue very similar to that of the cylinder information. If one +clicks the + button on the top right of the weights dialogue, the table looks like this:

@@ -1093,18 +1161,21 @@ this:

FIGURE:The Weights dialogue
-

If you click on the Type field, a drop-down list becomes accessible through a +

By clicking on the Type field, a drop-down list becomes accessible through a down-arrow:

FIGURE:Weights type drop-down list button
-

Use the drop-down list to select your type of weight system. In the Weight -field, type in the weight used during the dive. After specifying the weight -system either press ENTER on the keyboard or click outside the cell with the cursor. -It is possible to enter -information for more than one weight system by adding an additional system +

The drop-down list can then be used to select the type of weight system +used during the dive. In the Weight +field, type in the amount of weight used during the dive. After +specifying the weight +system, the user can either press ENTER on the keyboard or click outside the +cell with the cursor. +It is possible to enter information for more than one weight system by adding +an additional system using the + button on the top right hand. Weight systems can be deleted using the dustbin icon on the left hand. Here is an example of information for a dive with two types of weights: integrated and a weight belt:

@@ -1116,31 +1187,41 @@ with two types of weights: integrated and a weight belt:

3.2.5. Saving the updated dive information

-

The information entered in the Dive Notes tab, the Equipment tab can be -saved with all the other information of your dives in your logbook by using the -two buttons on the top right hand of the Dive Notes tab. If you click Save, -the dive data are saved. If you click Cancel, the newly entered dive data are +

The information entered in the Dive Notes tab and the Equipment tab can be +saved with all the other information of the dives in the user’s logbook by +using the +two buttons on the top right hand of the Dive Notes tab. If the Save button +is clicked, +the dive data are saved. If the Cancel button is clicked, then the newly +entered dive data are deleted, although the dive profile obtained from the dive computer will be -retained. When you exit Subsurface there is a final prompt to confirm that -the new data should be saved.

+retained. When the user exits Subsurface there is a final prompt to confirm +that the new data should be saved.

-

3.3. Importing dive information from other digital data sources or other data formats

-

Maybe you have a lot of dives logged using other dive log software. You don’t -have to type all information by hand into Subsurface, because you can probably -import your divelog. Subsurface will import divelogs from a range of other -dive log software. Some software is supported natively, for others you have to -export your logbook to XML and then Subsurface can import that XML file. -We do support importing CSV log files, with APD LogViewer, XP5 and Sensus being -preconfigured, but the import being flexible, users can configure their own -imports as well. Manually kept log files (e.g. in spreadsheet) can also be -imported by configuring the CSV import. +

3.3. Importing dive information from other digital data sources or other data

+

formats

+

If a user has been diving for some time, it’s possible that several dives were +logged using other dive log software. All this information needs not +be typed by hand into Subsurface, because these divelogs can probably be +imported onto Subsurface. Subsurface will import divelogs from a range of +other +dive log software. While some software is supported natively, for others the +user will have to +export the logbook(s) to an intermediate format so that they can then be imported +by Subsurface. +Currently, Subsurface supports importing CSV log files from several sources. +APD LogViewer, XP5 and Sensus files are +preconfigured, but because the import is flexible, users can configure their own +imports. +Manually kept log files (e.g. in spreadsheet) can also be imported by +configuring the CSV import. Subsurface can also import UDDF and UDCF files that are used by some divelog -software and even some divecomputers like the Heinrichs & Weikamp DR5. Finally, -for some divelog software like Mares Dive Organiser we currently suggest to -import your logbook first -into a webservice like divelogs.de and then import them from there with +software and some divecomputers, like the Heinrichs & Weikamp DR5. Finally, +for some divelog software like Mares Dive Organiser it is currently suggested to +import the logbooks first into a webservice like divelogs.de and then import +them from there with Subsurface, as divelogs.de supports a few additional logbook formats that Subsurface currently cannot parse.

When importing dives, Subsurface tries to detect multiple records for @@ -1150,15 +1231,15 @@ beginning time of the dives to be significantly different) Subsurface will not create duplicate entries.

3.3.1. Using the universal import dialogue

-

Importing dives from other software is performed through a unified interface that -is activated by selecting Import from the Main Menu, then clicking on +

Importing dives from other software is performed through a universal interface +that is activated by selecting Import from the Main Menu, then clicking on Import Log Files. This brings up the dialogue A below.

FIGURE: Import dialogue: step 1
-

Towards the bottom right is a dropdown selector with a default lable +

Towards the bottom right is a dropdown selector with a default label of Dive Log Files which gives access to the different types of direct imports available, as in dialogue B, above. Currently these are:

    @@ -1214,29 +1295,34 @@ accessible through the Import dialogue are also supported, as explained below.

    3.3.2. Importing from Mares Dive Organiser V2.1

    -

    Mares dive logs need to be imported using a three-step process, +

    Since Mares utilise proprietory Microsoft software not compatible with +multi-platform software, these dive logs cannot be directly imported into +Subsurface. Mares dive logs need to be imported using a three-step process, using www.divelogs.de as a mechanism to extract the dive information from the file.

    • -Export dive log data from Mares Dive Organiser to your desktop. See -Appendix C for more information. +The dive log data from Mares Dive Organiser need to be exported to the users +desktop, using + a .sdf file name extension. Users should refer to Appendix +C for more information.

    • -Import the data into www.divelogs.de. Create a user account in +Data should then be imported into www.divelogs.de. One needs to create a user +account in www.divelogs.de, log into that web site, then select Import Logbook → Dive Organiser from the menu on the left hand side. -Follow the instructions carefully to transfer the dive information from the -Dive Organiser data base to www.divelogs.de. +The instructions must be carefully followed to transfer the dive information +(in .sdf format) from the Dive Organiser data base to www.divelogs.de.

    • -Then follow the instructions below to import dives from divelogs.de to -Subsurface. +Finally, the instructions below should be followed in order to import dives +from divelogs.de to Subsurface.

    @@ -1244,13 +1330,16 @@ Then follow the instructions below to import dives from divelogs.de to

    3.3.3. Importing dives from divelogs.de

    The import of dive information from divelogs.de is simple, using a single -dialogue box. Select Import→Import form Divelogs.de from the Main Menu. This -brings up a dialogue box (see figure on left [A] below). You need to enter a -user-ID and password for divelogs.de into the appropriate fields. Then select -the Download button. Download from divelogs.de starts immediately, evident -on a progress bar in the dialogue box. At the and of the download, the -successful status is indicated (see figure on the right [B], below). Select the -Apply button. The imported dives appear in the Dive List panel.

    +dialogue box. The Import→Import form Divelogs.de option should be selected +from the Main Menu. This +brings up a dialogue box (see figure on left [A] below). one then needs to enter a +user-ID and password for divelogs.de into the appropriate fields and then +select +the Download button. Download from divelogs.de starts immediately, +displaying a progress bar in the dialogue box. At the and of the download, the +succes status is indicated (see figure on the right [B], below). The +Apply button should then be selected. The imported dives appear in the +Subsurface Dive List panel.

    FIGURE:Download from Divelogs.de @@ -1261,49 +1350,55 @@ successful status is indicated (see figure on the right [B], be

    3.3.4. Importing dives in CSV format

    Sometimes dive computers export dive information as files with comma-separated values (.CSV). For example, the APD Inspiration and Evolution -closed circuit rebreather (CCR) systems export dive information in CSV format that -normally contains information about a single dive only. These -files can easily be imported into Subsurface. CSV files are normally organised into -a single line that provides the titles of the data columns, followed by the data, one -record per line. CSV files can be opened with a normal text editor. Here is a highly -simplified and shortened example of a CSV file from an APD rebreather:

    +closed circuit rebreather (CCR) systems export dive information in CSV format +that normally contains information about a single dive only. These +files can easily be imported into Subsurface. +CSV files are normally organised into +a single line that provides the headers of the data columns, followed by the +data, one record per line. CSV files can be opened with a normal text editor. +Following is a highly simplified and shortened example of a CSV file from an +APD rebreather:

    -
    Dive Time (s)   Depth (m)       PPO2 - Setpoint (Bar)   PPO2 - C1 Cell 1 (Bar)  Ambient temp. (Celsius)
-0       0.0     0.70    0.81    13.1
-0       1.2     0.70    0.71    13.1
-0       0.0     0.70    0.71    13.1
-0       1.2     0.70    0.71    13.2
-0       1.2     0.70    0.71    13.1
-10      1.6     0.70    0.72    12.7
-20      1.6     0.70    0.71    12.6
-30      1.7     0.70    0.71    12.6
-40      1.8     0.70    0.68    12.5
-50      1.6     0.70    0.68    12.5
-60      2.4     0.70    0.69    12.5
-70      3.5     0.70    0.69    12.4
-80      4.2     0.70    0.72    12.5
-90      4.0     0.70    0.71    12.4
    +
            Dive Time (s)   Depth (m)       PPO2 - Setpoint (Bar)   PPO2 - C1 Cell
+1 (Bar) Ambient temp. (Celsius)
+        0       0.0     0.70    0.81    13.1
+        0       1.2     0.70    0.71    13.1
+        0       0.0     0.70    0.71    13.1
+        0       1.2     0.70    0.71    13.2
+        0       1.2     0.70    0.71    13.1
+        10      1.6     0.70    0.72    12.7
+        20      1.6     0.70    0.71    12.6
+        30      1.7     0.70    0.71    12.6
+        40      1.8     0.70    0.68    12.5
+        50      1.6     0.70    0.68    12.5
+        60      2.4     0.70    0.69    12.5
+        70      3.5     0.70    0.69    12.4
+        80      4.2     0.70    0.72    12.5
+        90      4.0     0.70    0.71    12.4
    -

    Note that each title may comprise more than one word, for instance Dive Time (s) -in the above data example. Before being able to import the data to Subsurface one first -needs to know:

    +

    Note that each title may comprise more than one word; for instance +Dive Time (s) in the above data example. Before being able to import the data +to Subsurface one first needs to know:

    1. -Which character separates the different columns within a single line of data? This -field separator should be either a comma (,) or a TAB character. This could be determined -by opening the file with a text editor. If it is comma-delimited, then the comma -characters between the values are clearly visible. If no commas are evident, the file -is probably TAB-delimited (i.e. it uses a TAB as a field separator, as in the above example). +Which character separates the different columns within a single line of +data? This field separator should be either a comma (,) or a TAB character. +This can be determined by opening the file with a text editor. If it is +comma-delimited, then the comma +characters between the values are clearly visible. If no commas are evident and +the numbers are aligned, +the file is probably TAB-delimited (i.e. it uses a TAB as a field separator, as +in the above example).

    2. Which data columns need to be imported into Subsurface?. The Dive Time and -Depth columns are always required. Open the file using a text editor and note the -titles of the columns to be imported and their column positions. For instance -for the above example: +Depth columns are always required. Open the file using a text editor and note +the titles of the columns to be imported and their column positions. For +instance for the above example:

      @@ -1314,30 +1409,36 @@ ppO2: column 4
    -

    Armed with this information, the import into Subsurface is straightforward. Select +

    Armed with this information, importing it into Subsurface is a +straightforward process. User should select Import→Import Log Files from the main menu. In the appearing file -selection menu, select one or more CSV files. Format is detected by the file +selection menu, users need to select one or more CSV files. Its format is +detected by the file extension, and a common configuration dialog is presented for all the -files with CSV extension. The configuration dialog is following:

    +files with a CSV extension. The configuration dialog is like the following:

    FIGURE: CSV download dialogue
    -

    Specify the name of the CSV file or select it from the browser button on the right. +

    Then the user must specify the name of the CSV file or select it from the +browser button on the right. There are pre-configured definitions for some dive computers, e.g. the APD -rebreathers. If your dive computer is on this list, select it using the dropdown -box labeled Pre-configured imports, click OK and the dive will be imported and -listed in the Dive List tab of Subsurface.

    -

    If your dive computer is not on the pre-configured list, then select the Field -Separator (TAB or comma) for your CSV file, using the appropriate -dropdown list. Lastly, indicate which columns in the CSV file contain which data -variables. For each data column used for import, check the appropriate check box +rebreathers. If the user’s dive computer is on this list, it should be selected +using the dropdown +box labeled Pre-configured imports. Finally the OK should be clicked and +the dive will be imported and listed in the Dive List tab of Subsurface.

    +

    If the dive computer is not on the pre-configured list, the user must +select the Field +Separator (TAB or comma) for the particular CSV file, using the appropriate +dropdown list. and indicate which columns in the CSV file +contain which data +variables. For each data column used for import, the user must check the +appropriate check box and indicate in which column these data are found. For instance, the image above corresponds to the dialogue that would apply to the CSV data set described above -the image. Having performed -the column specification, select the OK button and the dive will be imported and -listed in the Dive List tab of Subsurface.

    +the image. Having performed the column specification, select the OK button +and the dive will be imported and listed in the Dive List tab of Subsurface.

    3.3.5. Importing dives from manually kept CSV file

    @@ -1352,15 +1453,19 @@ of the CSV data to import.

    1. -Which character separates the different columns within a single line of data? This +Which character separates the different columns within a single line of +data? This should be either a comma (,), semicolon (;) or a TAB character, and could be determined by opening the file with a text editor. If it is comma-delimited, then the comma -characters between the values are clearly visible. If no commas are evident and the data +characters between the values are clearly visible. If no commas are evident and +the data are in clear columns, the file -is probably TAB-delimited (i.e. it uses a TAB as a field separator, as in the above example). -A recommended field separator for the export is tab, as comma might be used in the -fields themselves. +is probably TAB-delimited (i.e. it uses a TAB as a field separator, as in the +above example). +A recommended field separator for the export is tab, as commas might be used in +the +field values themselves.

    2. @@ -1369,7 +1474,7 @@ Which columns need to be imported into Subsurface?. We do not currently have any mandatory input fields, but some, e.g. dive duration are crucial for the log file to make any sense. Possible options can be seen in the image below and one should include all the -fields that are available in both your log file and in the Subsurface +fields available in both your log file and in the Subsurface import.

      3. @@ -1377,15 +1482,16 @@ import.

      Units used for depth, weight and temperature. We consider depth to be either feet or meters, weight kilograms or pounds and temperature either -Celsius or Fahrenheit. However, you can only select Metric or -Imperial. No mixture of unit systems is allowed for the different fields. +Celsius or Fahrenheit. However, the users can only select Metric or +Imperial in the Preferences tab of Subsurface.. No mixture of unit s +ystems is allowed for the different fields.

    Importing manually kept CSV log files is quite straight forward, but there might be many fields and counting the field numbers is error prone. Therefore validation of the data to be imported is critical.

    -

    To import your dives, select Import→Import Log Files from the menu +

    To import the dives, one must select Import→Import Log Files from the menu bar. If the CSV option in the dropdown list is selected and the file list includes file names ending with .CSV, one can select the Manual dives tab that will bring up the following configuration dialog:

    @@ -1394,60 +1500,64 @@ includes file names ending with .CSV, one can select the FIGURE: Download dialog for Manual CSV logs
    -

    Configure your input fields as appropriate, and when everything is done -select the OK button to perform the import. New dives should appear in -the Dive List area of Subsurface.

    +

    The input fields can be configured as appropriate, and when everything is done +the OK button should be selected to perform the import. New dives should +appear in the Dive List area of Subsurface.

-

3.4. Importing GPS coordinates with the Subsurface Companion app for mobile phones

-

If you have an Android device with GPS, you can obtain the coordinates of the -place where you are diving and automatically pass them to your Subsurface -divelog. To do this you need to:

+

3.4. Importing GPS coordinates with the Subsurface Companion app for mobile

+

phones +If the user has an Android device with GPS, the coordinates for the diving +location can be obtained and automatically passed to Subsurface +divelog. To do this, one needs to:

-

3.4.1. Using the Subsurface companion app on your smartphone

+

3.4.1. Using the Subsurface companion app on a smartphone

On first use the app has three options:

  • -Create a new account. Equivalent to registering in Subsurface companion page. +Create a new account. Equivalent to registering in Subsurface companion +page.

  • -Retrieve an account. If you forgot your DIVERID you will receive an email +Retrieve an account. If users forgot their DIVERID they will receive an email to recover the number.

  • -Use an existing account. You are prompted for your DIVERID. The app saves -your DIVERID and does not ask for it again unless you use the Disconnect menu +Use an existing account. Users are prompted for their DIVERID. The app saves +this DIVERID and does not ask for it again unless one uses the Disconnect menu option (see below).

-

Now you’re ready to get a dive position and send it to the server. The Android +

Now one is ready to get a dive position and send it to the server. The Android display will look like the left hand image (A) below, but without any dive.

-

Touching the "+" icon on the top right to add a new dive site. You will be +

Touching the "+" icon on the top right to add a new dive site. Users will be prompted for a place name (or asked to activate the GPS if it was turned off). -The main screen shows a list of dive locations, each with place name, date and +The main screen shows a list of dive locations, each with a name, date and time. Some dives may have an arrow-up icon on the selection box to the left (see image B in the middle, below) indicating that they require upload to the server.

There are several ways to send dives to the server; the easiest is by simply @@ -1463,14 +1573,14 @@ selecting the dive. See middle image below (B):

Important -Be careful, the trash on the right means exactly what it is supposed to mean, +Users must be careful, as the trash icon on the right means exactly what it is supposed to mean, it deletes the dive location(s).

The new dive points are now stored on the server and can be downloaded to the -Subsurface dive log whenever you upload or add your dive to Subsurface. +Subsurface dive log whenever users upload or add dives to Subsurface. After a dive trip using the Companion app, all dive locations are ready to be -saved on your Subsurface dive log (see below).

+saved on a Subsurface dive log (see below).

Settings on the Companion app

Selecting the Settings menu option results in the right hand image above ©.

@@ -1486,8 +1596,8 @@ saved on your Subsurface dive log (see below).

  • User ID. Obtained by registering as indicated above. The easiest way to -introduce it is simply to copy and paste from the confirmation mail but, off -course, you can type it each character at a time. +obtain it is simply to copy and paste from the confirmation mail but, of +course, users can also type this information.

    • @@ -1498,12 +1608,12 @@ course, you can type it each character at a time.

  • Synchronize on startup. If selected, dives in the Android device and those -on the web service will synchronize each time you start the app. +on the web service will synchronize each time the app is started.

  • -Upload new dives. If selected, each time you add a dive location it will +Upload new dives. If selected, each time the user adds a dive location it will automatically be sent to the server.

    • @@ -1511,14 +1621,14 @@ automatically be sent to the server.
    Background service
    -

    Instead of entering a unique dive location, you can leave the service running -in the background on your device, continuously collecting GPS locations.

    +

    Instead of entering a unique dive location, users can leave the service running +in the background of their device, thus allowing the continuous collection of GPS locations.

    The settings below define the behaviour of the service:

    • -Min duration. In minutes. The app’ll try to get a position each X minutes -until you stop it. +Min duration. In minutes. The app will try to get a position each X minutes +until it’s stopped by the user.

    • @@ -1537,12 +1647,13 @@ until you stop it. Tip -How does the background service work? Let’s assume we’ve set 5 minutes and 50 -meters in the settings above, the app will fix a location, then another one -each 5 minutes. If this 2nd (3rd, 4th …) location is within a radius of 50 -meters from the previous one, it is not saved. After another 5 minutes there will -be a new try, and so on. This way, if we are in a static position, we’ll only -get one location fix, but if we travel we can have a trace of our journey. +How does the background service work? Assuming that the user set 5 minutes and 50 +meters in the settings above, the app will start by taking a fix at the current location, +followed by another one +at every 5 minutes. If this 2nd (3rd, 4th …) location is within a radius of 50 +meters from the previous one, then this new fix is not saved. If the user is not moving, +only one fix is saved, but if the user is moving, then a trace of the journey is obtained, +by saving each new position at every 5 minutes.
    @@ -1551,7 +1662,7 @@ get one location fix, but if we travel we can have a trace of our journey.

    • -Mailing List. The mail box for Subsurface. You can send an email to the +Mailing List. The mail box for Subsurface. Users can send an email to the Subsurface mailing list.

      • @@ -1569,7 +1680,7 @@ Subsurface mailing list.
    Search
    -

    Here you can search your saved dive locations by the name or by date and hour.

    +

    Here one can search one’s saved dive locations by the name or by date and hour.

    Start service
    @@ -1577,11 +1688,12 @@ Subsurface mailing list.
    Disconnect
    -

    This is a badly named option. It disconnects your app from the server by -resetting your ID in the app, showing the first screen where you can create an -account, retrieve the ID for an existing one or use your own ID. Disconnecting -is useful if you download the dive positions of another registered diver using -your Android device.

    +

    This is a badly named option. It disconnects the app from the server by +resetting the user ID in the app, showing the first screen where an account +can be created, retrieve the ID for an existing account or use the users own +ID. The disconnect option +is useful if a user’s Android device was used to download the dive positions +of another registered diver.

    Send all locations
    @@ -1589,34 +1701,34 @@ your Android device.

    -

    3.4.2. Downloading dive locations to your Subsurface divelog

    -

    You have to download dive(s) from a dive computer or enter dives manually into +

    3.4.2. Downloading dive locations to a Subsurface divelog

    +

    Download dive(s) from a dive computer or enter them manually into Subsurface before obtaining the GPS coordinates from the server. The download dialog can be reached via Ctrl+G or from the Subsurface Main Menu Import → Import GPS data from Subsurface Service, resulting in the image on the -left (A), below. On first use the DIVERID text box will be blank. Provide the -DIVERID. Then select the Download button and the download begins. When this -is completed you see the screen on the right (B), below:

    +left (A), below. On first use the DIVERID text box will be blank. Users must provide their +DIVERID and then select the Download button to initiate the download process. When this +is completed, users will see the screen on the right (B), below:

    FIGURE: Downloading Companion app GPS data
    -

    Note that the Apply button is now active. Click on it to update the locations +

    Note that the Apply button is now active. By clicking on it, users can update the locations of the newly entered or uploaded dives in Subsurface which applies the -coordinates and names you gave them for all the new dives that match the date-times -of the uploaded GPS localities.

    +coordinates and names entered on the app for all the new dives that match the +date-times of the uploaded GPS localities.

    The Dive Info tab gives some summary information about a particular dive that has been selected in the Dive List. Useful information here includes the surface interval before the dive, the maximum and mean depths of the dive, the -gas volume consumed, the surface air consumption (SAC) and the number oxygen +gas volume consumed, the surface air consumption (SAC) and the number of oxygen toxicity units (OTU) incurred.

    +
    +
    Note Features, issues and tips._ Since Subsurface matches GPS locations from the -Android device and dive information from your dive computer based on date-time +Android device and dive information from the dive computer based on date-time data, automatic assignment of GPS data to dives is dependent on agreement of date and time between these two devices. If there is a large difference between -the time in your dive computer and the time in your Android device, -Subsurface is unable to identify the dive that matches a location and nothing +the time in the dive computer and the time in the Android device, +Subsurface is unable to identify the dive matching a location and nothing happens. Similar date-times may be not always be possible. A dirty hack is manually editing the date-time of a dive in Subsurface’s Dive List before downloading the GPS data and then to edit the date-time back again after @@ -1635,16 +1747,28 @@ downloading GPS data.
    + + +
    +Note +Gas consumption and SAC calculations: +Subsurface calculates SAC and Gas consumption taking in account gas +incompressibility, particularly at tank pressures above 200 bar, making them more accurate. +Users should refer to Appendix D for more information.
    +

    4.2. The Stats tab (for groups of dives)

    The Stats tab gives summary statistics for more than one dive, assuming that -more than one dive have been selected in the Dive List. Highlight more than -one dive by the standard Ctrl-click or Shift-click of the mouse. If only one +more than one dive have been selected in the Dive List using the standard +Ctrl-click or Shift-click of the mouse. If only one dive has been selected, figures pertaining to only that dive are given. This tab -shows the number of dives selected, the total amount of dive time in these dives, +shows the number of dives selected, the total amount of dive time in these +dives, as well as the minimum, maximum and mean for the dive duration, dive depth, water temperature and surface air consumption (SAC).

    @@ -1658,7 +1782,7 @@ water temperature and surface air consumption (SAC).

    Of all the panels in Subsurface, the Dive Profile contains the most detailed information about each dive. The main item in the Dive profile is the graph of dive depth as a function of time. In addition to the obvious information of -the depth it also shows the ascent and descent rate compared to the recommended +the depth it also shows the ascent and descent rates compared to the recommended speed of going up or down in the water column. This information is given using different colours:

    @@ -1704,16 +1828,18 @@ cellspacing="0" cellpadding="4">

    The profile also includes depth readings for the peaks and troughs in the graph. -Thus you should see the depth of the deepest point and other peaks. Mean depth +Thus, users should see the depth of the deepest point and other peaks. Mean depth is marked with a horizontal red line.

    The air consumption graph displays the tank pressure and its change during the dive. The air consumption takes depth into account so that even when manually entering the start and end pressures the graph is not a straight line. -Similarly to the depth graph the tank pressure gives you information about the -momentary SAC rate (Surface Air Consumption – often also called RMV – Respiratory -Minute Volume) when using an air integrated dive computer. Here the colour +Similarly to the depth graph the slope of the tank pressure gives the user information +about the +momentary SAC rate (Surface Air Consumption) when using an air integrated dive computer. +Here the colour coding is not relative to some absolute values but relative to the average -normalised air consumption during the dive. So areas that are red or orange indicate +normalised air consumption during the dive. So areas that are red or orange +indicate times of increased normalized air consumption while dark green reflects times when the diver was using less gas than average. The colour coding is obviously only possible when a tank sensor is connected and tank pressure readings during @@ -1722,8 +1848,10 @@ the dive are available.

    placed adjacent to significant changes.

    It is possible to zoom into the profile graph. This is done either by using the scroll wheel / scroll gesture of your mouse or trackpad. By default -Subsurface always shows a profile area large enough for at least 30 minutes and 30m - (100ft) – this way short or shallow dives are intuitively recognizable; something +Subsurface always shows a profile area large enough for at least 30 minutes +and 30m + (100ft) – this way short or shallow dives are intuitively recognizable; +something that free divers clearly won’t care about.

    @@ -1731,13 +1859,16 @@ that free divers clearly won’t care about.

    Measurements of depth differences can be achieved by using the button with -two vertical bars at the right of the dive profile panel (see above figure, -bottom right). Drag the red dots to the two points on the dive profile which -you would like to measure. Information is given along the line connecting the +two vertical bars at the right of the dive profile panel (users should refer to +the above figure, +bottom right). The measurement is done by dragging the red dots to the two points +on the dive profile that the user wishes to measure. Information is then given +along the line connecting the two red dots.

    The dive profile can include further information that is typically more interesting for tec divers. Enabling these is described in the section entitled -Setting up Preferences. Basically you can include graphs of the partial pressures +Setting up Preferences. Basically, users can include graphs of the partial +pressures of O2, N2, and He during the dive as well as a calculated and dive computer reported deco ceilings (only visible for deep, long, or repetitive dives). The partial pressure graphs are added below the profile data, the calculated ceiling @@ -1747,7 +1878,7 @@ these are NOT the gradient factors in use by the dive computer in question, but the gradient factors used by Subsurface to calculate deco obligations during the dive.

    The graph can also include the dive computer reported ceiling (or more -precisely, the first deco stop that the dive computer recorded – note that not +precisely, the first deco stop that the dive computer recorded – users are reminded that not all dive computers record this information and make it available for download; for example all of the Suunto dive computers fail to make this very useful data available to divelog software). Because of the differences in used algorithms @@ -1757,10 +1888,12 @@ true even if the same algorithm and gradient factors (see below) are us It is also quite common that Subsurface calculates a ceiling for non-decompression dives when the dive computer stayed in non-deco mode during the whole dive (represented by the dark green section in the profile -at the beginning of this section). This is caused by the fact that Subsurface’s +at the beginning of this section). This is caused by the fact that +Subsurface’s calculations describe the deco obligation at that point in time during a dive, while dive computers usually take the upcoming ascent into account. During the -ascent some excess Nitrogen (and possibly Helium) are already breathed off so even +ascent some excess Nitrogen (and possibly Helium) are already breathed off so +even though the diver technically encountered a ceiling at depth, the dive still does not require an explicit deco stop. This feature allows dive computers to offer longer non-stop bottom time.

    @@ -1830,7 +1963,7 @@ as the calculated ceiling for several Bühlmann tissue compartments.

    5.1. The Dive List context menu

    -

    Many actions within Subsurface are dependent on a context menu that is used +

    Many actions within Subsurface are dependent on a context menu used mostly to manipulate groups of dives. The context menu is found by selecting a dive or a group of dives and then right-clicking.

    @@ -1847,20 +1980,20 @@ numbers) to recent dives (having the highest sequence numbers). The numbering of the dives is not always consistent. For instance, when non-recent dives are added to the dive list the numbering does not automatically follow on because of the dives that are more recent in date/time than the newly-added dive that -has an older date/time. Therefore you sometimes may need to renumber the dives. -This is performed by selecting (from the Main Menu) Log → Renumber. You are +has an older date/time. Therefore, one may sometimes need to renumber the dives. +This is performed by selecting (from the Main Menu) Log → Renumber. Users are given a choice with respect to the lowest sequence number to be used. Completing this operation results in new sequence numbers (based on date/time) for the dives in the Dive List panel.

    5.3. Grouping dives into trips and manipulating trips

    -

    If you dive regularly, the dive list can rapidly become very long. Subsurface +

    For regular divers, the dive list can rapidly become very long. Subsurface can group dives into trips. It performs this by grouping dives that have date/times that are not separated in time by more than two days, thus creating a single heading for each diving trip represented in the dive log. Below is an -ungrouped dive list (A, on the left) as well as a grouped dive list with -several trips (B, on the right):

    +ungrouped dive list (A, on the left) as well as the corresponding grouped dive +list comprising five dive trips (B, on the right):

    Figure: Grouping dives @@ -1868,46 +2001,47 @@ several trips (B, on the right):

    Grouping into trips allows a rapid way of accessing individual dives without having to scan long lists of dives. In order to group the dives in a dive list, -(from the Main Menu) select Log → Autogroup. The Dive List panel now shows +(from the Main Menu) users must select Log → Autogroup. The Dive List panel now shows only the titles for the trips.

    5.3.1. Viewing the dives during a particular trip

    -

    Once when the dives have been grouped into trips, you can expand one or more +

    Once when the dives have been grouped into trips, users can expand one or more trips by clicking the arrow-head on the left of each trip title. This expands the selected trip, revealing the individual dives performed during the trip.

    5.3.2. Editing the title and associated information for a particular trip

    Normally, in the dive list, minimal information is included in the trip title. -You can add much more information about a trip by selecting its trip title from +More information about a trip can be added by selecting its trip title from the dive list. This shows a Trip Notes tab in the Dive Notes panel. Here -you can add or edit information about the date/time, the trip location and any -other general comment about the trip as a whole (e.g. the dive company you -dived with, the general weather during the trip). After entering this -information, select Save from the buttons at the top right of the Trip Notes +users can add or edit information about the date/time, the trip location and any +other general comments about the trip as a whole (e.g. the dive company that was +dived with, the general weather during the trip, etc.). After entering this +information, users should select Save from the buttons at the top right of the Trip Notes tab. The trip title in the Dive List panel should now reflect some of the edited information.

    5.3.3. Collapsing or expanding dive information for different trips

    -

    If you right-click after selecting a particular trip in the dive list, the +

    If a user right-clicks after selecting a particular trip in the dive list, the resulting context menu allows several possibilities to expand or collapse dives within trips. This includes expanding all trips, collapsing all trips and collapsing all trips except the selected one.

    5.3.4. Merging dives from more than one trip into a single trip

    -

    When you right-click on a selected trip title in the Dive List panel, the -context menu allows the merging of trips by either merging of the selected trip +

    By right-clicking on a selected trip title in the Dive List panel, a +context menu shows up that allows the merging of trips by either merging of the selected trip with the trip below or with the trip above.

    5.3.5. Splitting a single trip into more than one trip

    -

    If a trip includes five dives, you can split this trip into two trips (trip 1: +

    If a trip includes five dives, the user can split this trip into two trips (trip 1: top 3 dives; trip 2: bottom 2 dives) by selecting and right-clicking the top -three dives. The resulting context menu allows you to create a new trip by -choosing the option Create new trip above. The top three dives are then grouped -into a separate trip. See below, the selection and context menu on the left (A), +three dives. The resulting context menu allows the user to create a new trip by +choosing the option Create new trip above. The top three dives are then +grouped +into a separate trip. The figures bellow show the selection and context menu on the left (A) and the completed action on the right (B):

    @@ -1922,29 +2056,36 @@ the completed action on the right (B):

    5.4.1. Delete a dive from the dive log

    Dives can be permanently deleted from the dive log by selecting and right-clicking them to bring up the context menu, and then selecting Delete -dive(s). Typically this would apply to a case where you wish to delete workshop +dive(s). Typically this would apply to a case where a user wishes to delete +workshop calibration dives of the dive computer or dives of extremely short duration.

    5.4.2. Unlink a dive from a trip

    -

    You can unlink dives from the trip to which they belong. Select and right-click -the dives to bring up the context menu. Then select Remove dive(s) from trip. +

    Users can unlink dives from the trip to which they belong. In order to do this, +users should select and right-click +the relevant dives to bring up the context menu. Then the option Remove dive(s) +from trip should be selected. The dives that have been unlinked now appear immediately above the trip to which they belonged.

    5.4.3. Add a dive to the trip immediately above

    Selected dives can be moved from the trip to which they belong and placed within -the trip immediately above the currently active trip. Select and right-click -the dives to bring up the context menu, then select Add dive(s) to trip +the trip immediately above the currently active trip. To do this, users must select +and right-click +the dives to bring up the context menu, and then select Add dive(s) to trip immediately above.

    5.4.4. Shift the start time of dive(s)

    Sometimes it is necessary to adjust the start time of a dive. This may apply to situations where dives are performed in different time zones or when the dive -computer has an erroneous time. Select and right-click the dive(s) to be -adjusted. This brings up the context menu. Select Shift times. Specify the time +computer has an erroneous time. In order to do this, user must select and right-click +the dive(s) to be +adjusted. This action brings up the context menu on which the Shift times +option should be selected. User must then specify the +time (in hours and minutes) by which the dives should be adjusted and click on the option indicating whether the time adjustment should be forwards or backwards.

    @@ -1952,9 +2093,9 @@ option indicating whether the time adjustment should be forwards or backwards.5.4.5. Merge dives into a single dive

    Sometimes a dive is briefly interrupted, e.g. if a diver returns to the surface for a few minutes, resulting in two or more dives being recorded by the dive -computer and appearing as different dives in the Dive List panel. You can -merge these dives onto a single dive by selecting the appropriate dives and -right-clicking them to bring up the context menu. Then select Merge selected +computer and appearing as different dives in the Dive List panel. Users can +merge these dives onto a single dive by selecting the appropriate dives, +right-clicking them to bring up the context menu and then selecting Merge selected dives. It may be necessary to edit the dive information in the Dive Notes panel to reflect events or conditions that apply to the merged dive. The figure below shows the depth profile two such dives that were merged:

    @@ -1979,66 +2120,66 @@ below shows the depth profile two such dives that were merged:

  • -Universal Dive Data format (UDDF). See http://uddf.org for more information. +Universal Dive Data format (UDDF). User should refer to http://uddf.org for more information. UDDF is a generic format that enables communication among many dive computers and computer programs.

    • -

    In order to save the WHOLE dive log (i.e. all trips and dives), select File -from the Main menu. To save in Subsurface XML format, select File → Save -as. To save in UDDF format, select File → Export UDDF.

    -

    In order to save only one or more dives or one or two trips, select the -appropriate dives or trips in the Dive List panel. Then right-click the +

    In order to save the WHOLE dive log (i.e. all trips and dives), File should be selected +from the Main menu. To save in Subsurface XML format, users should select File → Save +as. To save in UDDF format, the File → Export UDDF option should be selected.

    +

    In order to save only one or more dives or one or two trips, users can select the +appropriate dives or trips in the Dive List panel and then right-click the selected dives to bring up the context menu. To save in Subsurface XML -format, select Save as from the context menu. To save in UDDF format, select +format, users should select Save as from the context menu. To save in UDDF format, users should select Export as UDDF from the context menu.

    -

    7. Printing your dive log

    +

    7. Printing a dive log

    -

    Subsurface provides a simple interface to print your whole dive log or only a +

    Subsurface provides a simple interface to print a whole dive log or only a few selected dives, including dive profiles and other contextual information.

    Before printing, two decisions are required:

    • Should the whole dive log be printed or only part of it? If only part of the -dive log is required, then select the required dives from the Dive List panel. +dive log is required, then the user must select the required dives from the Dive List panel.

    • -What gas partial pressure information is required on the dive profile? Select +What gas partial pressure information is required on the dive profile? Users should select the appropriate information from the Main Menu: File→Preferences→Graph.

    -

    Now you need to select the print options. To do this, select File→Print from +

    Now the print options should be selected to match the user’s needs. To do this, user should select File→Print from the Main menu. The following dialogue appears (see the image on the left [A], below).

    -

    Under Print type you need to select one of three options:

    +

    Under Print type users need to select one of three options:

    • -Print the Dive List. Do do this, select Table Print. +Print the Dive List: to do this, Table Print should be selected.

    • Print the full dive records (dive profiles and all other information) at 6 -dives per printed page. To do this, select 6 dives per page. +dives per printed page: to do this, users should select 6 dives per page.

    • Print the full dive records (dive profiles and all other information) at 2 -dives per printed page. To do this, select 2 dives per page. +dives per printed page: to do this, users should select 2 dives per page.

    -

    Under Print options you need to select:

    +

    Under Print options users need to select:

    • @@ -2056,22 +2197,25 @@ Printing in colour, achieved by checking the box with Print in color.

      The Ordering affects the layout of the page (or part of it) for each dive. The dive profile could be printed at the top of each dive, with the textual information underneath, or it could be printed with the textual information at -the top with the dive profile underneath. Select the appropriate option in the -print dialogue. See the image on the right (B), above which has a layout with +the top with the dive profile underneath. Users should select the appropriate option in the +print dialogue. See the image on the right (B), above which has a layout with text above the dive profile.

      -

      You can Preview the printed page by selecting the Preview button on the -dialogue. After preview, changes to the options in the print dialogue can be made -to give a layout that fits personal taste.

      +

      Users can Preview the printed page by selecting the Preview button on the +dialogue. After preview, changes to the options in the print dialogue can be +made, resulting in a layout that fits personal taste.

      FIGURE: Print dialogue
      -

      Now, select the Print button in the dialogue. This activates the regular print -dialogue used by your operating system (image [B] in the middle, above), allowing -you to choose a printer and to set its properties (image [C] on the right, above). -Remember to set the print resolution of the printer to an appropriate value by changing -the printer properties. Finally, print the dives. Below is a (rather small) example of +

      Next, select the Print button in the dialogue. This activates the regular print +dialogue used by the user operating system (image [B] in the middle, above), +allowing them to choose a printer and to set its properties (image [C] on the right, +above). +It is important to set the print resolution of the printer to an appropriate value by +changing +the printer properties. Finally, users can print their dives. Below is a (rather small) +example of the output for one particular page.

      @@ -2081,13 +2225,13 @@ the output for one particular page.

      -

      8. Setting your Preferences for Subsurface

      +

      8. Setting user Preferences for Subsurface

      -

      There are several settings within Subsurface that the user can specify. These +

      There are several settings within Subsurface that the users can specify. These are found when selecting File→Preferences. The settings are performed in four groups: Defaults, Units, Graph and Language. All four sections -operate on the same principles: specify the settings you wish to change, then -save these using the Apply button. After applying all the new settings you can +operate on the same principles: the user must specify the settings the are to be changed, then +these changes are saved using the Apply button. After applying all the new settings users can then leave the settings panel by selecting OK.

      8.1. Defaults

      @@ -2100,29 +2244,28 @@ leave the settings panel by selecting OK.

      • -Lists and tables: Here you can specify the font type and font size of the -Dive Table panel. By decreasing the font size of the Dive table, -you can see more dives on a screen. +Lists and tables: Here one can specify the font type and font size of the +Dive Table panel. By decreasing the font size of the Dive table, users can see more dives on a screen.

      • -Dives: Here you need to specify the directory and file name of your -electronic dive log book. This is a file with filename extension .xml. When -launched, Subsurface will then automatically load the dive log book specified. +Dives: Here one need to specify the directory and file name of one’s +electronic dive log book(s). This is a file with filename extension .xml. When +launched, Subsurface will then automatically load the specified dive log book.

      • -Display invalid: Dives can be marked as invalid (when you want to hide -dives that you don’t consider valid dives, e.g. pool dives, but still want to +Display invalid: Dives can be marked as invalid (when a user wishes to hide +dives that he/she don’t consider valid dives, e.g. pool dives, but still want to keep them in the dive log). This controls whether those dives are displayed in the dive list.

      • -Use Default cylinder: Here you can specify the default cylinder listed in +Use Default cylinder: Here users can specify the default cylinder listed in the Equipment tab of the Dive Notes panel.

        • @@ -2135,12 +2278,11 @@ the Equipment tab of the Dive Notes panel. FIGURE: Preferences Units page
      -

      Here you can choose between metric and imperial measures of depth, pressure, +

      Here user can choose between metric and imperial units of depth, pressure, volume, temperature and mass. By selecting the Metric or Imperial radio button -at the top, you can specify that all units are in the chosen measurement system -. Alternatively, if you select the Personalise radio button, you can select -a mixture with some measurements being metric while others are in imperial -measures.

      +at the top, users can specify that all units are in the chosen measurement system. +Alternatively, if one selects the Personalise radio button, units can be selected +independently, with some units in the metric system and other in the imperial.

      8.3. Graph

      @@ -2153,19 +2295,14 @@ measures.

      • -Show: Here you specify the amount of information that is shown as part of +Show: Here users can specify the amount of information shown as part of the dive profile:

        • -Gas pressure graphs: Subsurface can display the pressures of the gases -with which you dive. If you dive breathing air, then the only important gas is -nitrogen. You can instruct Subsurface to plot the nitrogen pressure during -your dive. If you dive breathing nitrox, then you can select a graph of both the -nitrogen and oxygen pressures during your dive. If you dive with trimix or -heliox, you can select the display of the helium pressure as well. For each of -these graphs you can specify a threshold value on the right-hand side of the +Gas pressure graphs: Subsurface can display the nitrogen, oxygen and the helium partial pressures during +the dive. For each of these graphs users can specify a threshold value on the right-hand side of the panel. If any of the graphs go above this threshold level, the graph is highlighted in red, indication that the threshold value has been exceeded (see figure below). @@ -2173,8 +2310,8 @@ figure below).

        • -Ceiling: Ascent ceilings arise when a direct ascent to the surface exposes -the diver to decompression sickness (DCS) and it is necessary to either ascend +Ceiling: Ascent ceilings arise when a direct ascent to the surface increases +the risk of a diver suffering from decompression sickness (DCS) and it is necessary to either ascend slower or to perform decompression stop(s) before ascending to the surface. Subsurface can indicate these ceilings above which the diver should not ascend at a particular point in time (see the green-shaded areas in the figure in the @@ -2183,19 +2320,19 @@ section on Dive Profiles) and in the figure below:

          • -If you check Calculated ceiling, then a ceiling is shown if it exists for +If the Calculated ceiling option is checked, then a ceiling is shown if it exists for a particular dive (A in figure below)

          • -If you check show all tissues, the ceiling is shown for the tissue +If the show all tissues option is checked, the ceiling is shown for the tissue compartments following the Bühlmann model (B in figure below).

          • -If you check 3m increments, then the ceiling is indicated in 3m-increments +If the 3m increments option is checked, then the ceiling is indicated in 3 m increments (C in figure below).

            • @@ -2219,7 +2356,7 @@ applies to a dive profile, these can be shown by checking the appropriate boxes.

            If a Maximum partial pressure of oxygen (maxPPO2) applies to dives, then this can be specified in the appropriate text box. In addition, if a -no-decompression limit (NDL) is to be shown in the info box, then check the +no-decompression limit (NDL) is to be shown in the info box, then users must check the appropriate box.

            @@ -2234,8 +2371,8 @@ appropriate box.

            • -Misc: Here you can set the gradient factors used while diving. GF_Low is -the gradient factor at deep depths and GF_High is used just below the surface. +Misc: Here users can set the gradient factors used while diving. GF_Low is +the gradient factor at deep and GF_High is used just below the surface. At intermediate depths gradient factors between GF_Low and GF_High are used. Gradient factors add conservatism to the nitrogen exposure during a dive, in a similar way that many dive computers have a conservatism setting. The lower @@ -2253,8 +2390,7 @@ deepest depth of a dive. For more information see:

            • -Gradient factors for dummies, by Kevin - Watts +Gradient factors for dummies, by Kevin Watts

            @@ -2266,7 +2402,7 @@ deepest depth of a dive. For more information see:

            A checkbox allows one to use the System Default language which in most cases will be the correct setting; with this Subsurface simply runs in the same language / country settings as the underlying OS. If this is for some reason -undesirable you can uncheck this checkbox and pick a language / country +undesirable users can uncheck this checkbox and pick a language / country combination from the list of included localizations.

        @@ -2342,13 +2478,8 @@ from a dive computer.

      • -Import Files - Import dive information from a file in -UDDF or in another Subsurface-compatible format. -

        -
        • -
      • -

        -Import CSV - Import dive information from a data file in CSV format. +Import Files - Import dive information from a file in +in a Subsurface-compatible format.

      • @@ -2375,7 +2506,8 @@ from www.Divelogs.de.

      • -Renumber - Renumber the dives listed in the Dive List panel. +Renumber - Renumber the dives listed in the Dive List +panel.

      • @@ -2475,46 +2607,39 @@ well as licensing information.

        10. APPENDIX A: Operating system specific information for importing dive information from a dive computer.

        -

        10.1. Make sure that your OS has the required drivers installed

        +

        10.1. Make sure that the OS has the required drivers installed

        -
        Note The operating system of your desktop computer needs the appropriate drivers in -order to communicate with your dive computer in whichever way your dive +The operating system of the desktop computer needs the appropriate drivers in +order to communicate with the dive computer in whichever way the dive computer prefers (e.g. bluetooth, USB, infrared).

        • -On Linux this means you need to have the correct kernel - module loaded. Most distributions will do this automatically - for you. Make sure you have read/write permissions to that - port. On Ubuntu that could mean you should run the command - following command in a terminal window: +On Linux this means users need to have the correct kernel + module loaded. Most distributions will do this automatically.

          -
          -
          -
          +sudo adduser+ [your_username] +dialout+
          -

        • On Windows, the OS should offer to download the correct - driver once you connect your dive computer to the USB port. + driver once the user connects the dive computer to the USB port.

        • -On a Mac you at times have to manually hunt for the correct +On a Mac users sometimes have to manually hunt for the correct driver. For example the correct driver for the Mares Puck devices can be found as Mac_OSX_VCP_Driver.zip at - http://www.silabs.com/support/pages/support.aspx?ProductFamily=USB+Bridges

        +

        http://www.silabs.com/support/pages/support.aspx?ProductFamily=USB+Bridges

        10.2. How to Find the Device Name for USB devices and set its write permission

        @@ -2523,12 +2648,12 @@ On a Mac you at times have to manually hunt for the correct Note -When you connect your dive computer by using a USB connector, usually +When a user connects the dive computer by using a USB connector, usually Subsurface will either propose a drop down list that contains the correct device name (or mount point for the Uemis Zurich), or it will disable the device select drop down if no device name is needed at -all. In the rare cases where this doesn’t work here are some -instructions on ways to find out what your device name is: +all. In the rare cases where this doesn’t work, here are some +instructions on ways to find out what the device name is:
        On Windows:

        Simply try COM1, COM2, etc. The drop down list should contain all connected COM @@ -2538,7 +2663,7 @@ devices.

        • -Disconnect your USB cable of your dive computer +Disconnect the USB cable from the dive computer

        • @@ -2553,7 +2678,7 @@ Type the command: dmesg and press enter

        • -Plug in your USB cable of your dive computer +Plug in the USB cable of the dive computer

        • @@ -2562,7 +2687,7 @@ Type the command: dmesg and press enter

        -

        Within your terminal you should see a message similar to this one:

        +

        Within the terminal, users should see a message similar to this one:

        usb 2-1.1: new full speed USB device number 14 using ehci_hcd
@@ -2581,30 +2706,38 @@ usb 2-1.1: FTDI USB Serial Device converter now attached to ttyUSB3
 usbcore: registered new interface driver ftdi_sio
 ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver
        -

        You see that in the third line from the bottom, the USB adapter is -detected and is connected to ttyUSB3. Now you use this information in -the import settings as /dev/ttyUSB3. This directs Subsurface to the correct USB port.

        +

        Users can see that in the third line from the bottom, the USB adapter is +detected and is connected to ttyUSB3. This information can now be used in +the import settings as /dev/ttyUSB3. This directs Subsurface to the correct +USB port.

        Ensuring you have write permission to the USB serial port:

        -

        On Unix-like operating systems the USB ports can only be accessed by users who are members -of the dialout group. If you are not root, the user may not be a member of that group and -will not be able to use the USB port. Let us assume your username is johnB.

        +

        On Unix-like operating systems the USB ports can only be accessed by users who +are members +of the dialout group. If one is not root, one may not be a member of +that group and +will not be able to use the USB port. Let us assume one’s username is johnB.

        • -As root, type: usermod -a -G dialout johnB (Ubuntu users: sudo -a -G dialout johnB) +As root, type: usermod -a -G dialout johnB (Ubuntu users: sudo -a -G +dialout johnB) This makes johnB a member of the dialout group.

        • -Type: id johnB This lists all the groups that johnB belongs to and verifies that -the appropriate group membership has been created. The dialout group should be listed +Type: id johnB This lists all the groups that johnB belongs to and +verifies that +the appropriate group membership has been created. The dialout group should +be listed among the different IDs.

        -

        With the appropriate device name (e.g. dev/ttyUSB3) and with write permission to the USB -port, your dive computer interface can connect and you should be able to import your dives.

        +

        With the appropriate device name (e.g. dev/ttyUSB3) and with write permission +to the USB +port, the dive computer interface can connect and one should be able to import +dives.

        10.3. Setting up bluetooth enabled devices

        @@ -2653,24 +2786,26 @@ through the pairing process. This step should only be needed once for initial setup.

        Once the pairing is completed the correct device will be shown in the Device or Mount Point drop down in the Subsurface Import dialog.

        -
        On Linux

        Ensure sure bluetooth is enabled on the Subsurface computer. +

        On Linux

        Ensure bluetooth is enabled on the Subsurface computer. On most common distributions this should be true out of the box. If not then depending on your system, running initd or systemd. This might be different -and also involve loading modules specific to your hardware. In case your system is -running systemd, manually run sudo systemctl start bluetooth.service to enable +and also involve loading modules specific to your hardware. In case your system +is +running systemd, manually run sudo systemctl start bluetooth.service to +enable it, in case of initd, run something like sudo rc.config start bluetoothd or sudo /etc/init.d/bluetooth start.

        Pairing should be straight forward. Using Gnome3 for instance will show a -bluetooth icon in the upper right corner of your desktop where you select Set -up New Device. This should show you a dialog where you are able to select your -dive computer (in bluetooth mode) and pair it. If you have issues with PIN +bluetooth icon in the upper right corner of the desktop where one selects Set +up New Device. This should show a dialog where one can select the +dive computer (in bluetooth mode) and pair it. For issues with PIN setting try manually setting 0000.

        -

        You may also use a manual approach by using such commands:

        +

        One may also use a manual approach by using such commands:

        • sudo hciconfig - shows the bluetooth devices available on your -computer (not dive computer), most likely you will see a hci0, if not +computer (not dive computer), most likely one will see a hci0, if not try sudo hcitool -a to see inactive devices and try to run sudo hciconfig hci0 up to bring them up

          @@ -2678,14 +2813,14 @@ hciconfig hci0 up to bring them up

        • sudo hcitool scanning- use this to get a list of bluetooth enabled -client devices, watch out for your dive computer and remember the MAC +client devices, look for the dive computer and remember the MAC address shown there

        • sudo bluez-simple-agent hci0 10:00:E8:C4:BE:C4 - this will pair -your dive computer with the bluetooth stack of your computer, copy/paste +the dive computer with the bluetooth stack of the Subsurface computer, copy/paste the MAC address from the output of hcitool scanning

          • @@ -2696,21 +2831,22 @@ manually by running:

      • sudo rfcomm bind /dev/rfcomm0 10:00:E8:C4:BE:C4 - bind the dive -computer to a communication device in your computer, in case rfcomm is +computer to a communication device in the desktop computer, in case rfcomm is already taken just use rfcomm1 or up, please copy/paste the MAC address from the output of hcitool scanning, the MAC shown in here will not -work for you. +work.

      -

      For downloading dives in Subsurface you have then to specify /dev/rfcomm0 +

      For downloading dives in Subsurface one then has to specify /dev/rfcomm0 as device name to use.

    -

    11. APPENDIX B: Dive Computer specific information for importing dive information.

    +

    11. APPENDIX B: Dive Computer specific information for importing dive

    +

    information.

    11.1. Import from a Uemis Zurich

    @@ -2720,34 +2856,34 @@ as device name to use.

    Things are very similar to a normal USB-connected dive computer when downloading dives from a Uemis Zurich -dive computer (which certainly is one of the ones that DO recharge when -connected to the USB port). The main difference is that you don’t enter a +dive computer (one of the ones that recharge when +connected to the USB port). The main difference is that one does not enter a device name, but instead the location where the UEMISSDA file system is mounted once you connect the dive computer. On Windows this is a drive letter ( often E: or F:), on a Mac this is /Volumes/UEMISSDA and on Linux systems this differs depending on the -distribution that you use. On Fedora it usually is +distribution. On Fedora it usually is /var/run/media/<your_username>/UEMISSDA. In all cases Subsurface should suggest the correct location in the drop down list.
    -

    Once you have selected this as device name you can download the +

    Once onehas selected this as device name one can download the dives from the Uemis Zurich. One technical issue with the Uemis Zurich download implementation (this is a firmware limitation, not a -Subsurface issue) is that you cannot download more than about 40-50 +Subsurface issue) is that one cannot download more than about 40-50 dives without running out of memory on the SDA. This will usually only -happen the very first time you download dives from the Uemis Zurich - +happen the very first time one downloads dives from the Uemis Zurich - normally when downloading at the end of a day or even after a dive trip, the capacity is sufficient. If Subsurface displays an error that the dive computer ran out of space the solution is straight forward. Disconnect the SDA, turn it off and on again, and reconnect it. You can now retry (or start a new download session) and the -download will continue where it stopped the last time you tried. You -may have to do this more than once, depending on how many dives you -have stored on your dive computer.

    -

    At this point Subsurface downloads most of the information that is +download will continue where it stopped previously. One +may have to do this more than once, depending on how many dives are +stored on the dive computer.

    +

    At this point Subsurface downloads most of the information stored on the SDA, including information about dive spots and -equipment. Buddy information is not yet downloaded.

    +equipment. Buddy information is not yet downloadable.

    11.2. Importing dives from Heinrichs Weikamp DR5

    @@ -2776,7 +2912,8 @@ will most likely differ from the one displayed on the DR5. Note Using a Shearwater Predator you may be able to pair Bluetooth but then encounter -issues when downloading, showing errors like Slip RX: unexp. SLIP END on the Predator. +issues when downloading, showing errors like Slip RX: unexp. SLIP END on the +Predator. This might also be seen, when using other dive log software and operating systems than Linux. We have no detailed idea about the source and how to fix this, but it is reported to be solved sometimes by one of these steps: @@ -2806,15 +2943,18 @@ switch off WiFi while using Bluetooth

    12. APPENDIX C: Exporting Dive log information from external dive log software.

    -

    The import of dive log data from external dive log software is mostly performed using +

    The import of dive log data from external dive log software is mostly performed +using the dialogue found by selecting Import from the Main Menu, then clicking on -Import Log Files. This is a single-step process, more information about which can be found +Import Log Files. This is a single-step process, more information about which +can be found here. However, in some cases, a two-step process may be required:

    • -Export the forieign dive log data to format that is accessible from Subsurface. +Export the forieign dive log data to format that is accessible from +Subsurface.

    • @@ -2823,24 +2963,37 @@ Import the accessible dive log data into Subsurface.

    -

    This appendix provides some information about approaches to export dive log data from foreign +

    This appendix provides some information about approaches to export dive log +data from foreign dive log software. The procedures below mostly apply to Linux and/or Windows.

    -

    12.1. Exporting dives from Suunto Divemanager 3 (DM3)

    +

    12.1. Exporting dives from Suunto Divemanager (DM3 and DM4)

    +
    + + + +
    +Note +Divemanager 3 (DM3) is an older version of the Suunto software. More recent +Suunto dive computers use Divemanager 4 (DM4). The +two versions of Divemanager use different methods and different file naming +conventions to export dive log data.
    +
    +

    Divemanager 3 (DM3):

    • -Start Suunto Divemanager and log in with the name containing the logs +Start Suunto Divemanager 3 and log in with the name containing the logs

    • -Do not start the import wizard to import dives from your computer. +Do not start the import wizard to import dives from the dive computer.

    • -In the navigation tree on the left side of the program-window, select your +In the navigation tree on the left side of the program-window, select the appropriate dives.

      • @@ -2856,7 +3009,8 @@ To select certain dives: hold ctrl and click the dive

    • -To select all dives: Select the first dive, hold down shift and select the +To select all dives: Select the first dive, hold down shift and +select the last dive

      • @@ -2889,12 +3043,13 @@ A file-manager like window pops up

    • -Navigate to the directory where you want to store the Divelog.SDE file +Navigate to the directory or storing the +Divelog.SDE file

    • -Optionally change the name of the file you want to save +Optionally change the name of the file for saving

    • @@ -2906,22 +3061,20 @@ Click Save

    • -You are back in the Export pop-up. Press the button Export +Back in the Export pop-up, press the button Export

  • -Your dives are now exported to the file Divelogs.SDE. +The dives are now exported to the file Divelogs.SDE.

    • -
    -
    -

    12.2. Exporting dives from Suunto Divemanager 4 (DM4)

    -

    To import divelog from Suunto DM4, you need to locate the DM4 database -where the dives are stored. You can either look for the original +

    Divemanager 4 (DM4):

    +

    To import divelog from Suunto DM4, one needs to locate the DM4 database +where the dives are stored. the user can either look for the original database or take a backup of the dives. Both methods are described here.

    Locating the Suunto DM4 database:

      @@ -2981,51 +3134,65 @@ Click Save

    • -Your dives are now exported to the file DM4.bak +The dives are now exported to the file DM4.bak

    -

    12.3. Exporting from Mares Dive Organiser V2.1

    -

    Mares Dive Organiser is a Windows application. The dive log is kept as a +

    12.2. Exporting from Mares Dive Organiser V2.1

    +
    + + + +
    +Note +Mares Dive Organiser is a Microsoft application. The dive log is kept as a Microsoft SQL Compact Edition data base with a .SDF filename extension. The data base includes all Dive Organiser-registered divers on the particular -computer and all Mares dive computers used. Since -Mares utilise proprietory Windows software not compatible with multi-platform software, -these dive logs cannot be directly imported into Subsurface. The safest way to obtain a copy -these dive data base is to export the information to another compatibale format -which can be imported into Subsurface.

    +computer and all Mares dive computers used. The safest way to obtain a copy +of the dive data base is to export the information to another compatible format +which can be imported into Subsurface.
    +

    • Within Dive Organiser, select -Database → Backup from the main menu and back up the data base to the desk top. +Database → Backup from the main menu and back up the data base to the desk +top. This creates a zipped file DiveOrganiserxxxxx.dbf.

    • Rename the file to -DiveOrganiserxxxxx.zip. Inside the zipped directory is a file DiveOrganiser.sdf. +DiveOrganiserxxxxx.zip. Inside the zipped directory is a file +DiveOrganiser.sdf.

    • -Extract it from the zipped folder to your Desktop. +Extract the .sdf file from the zipped folder to your Desktop.

    -

    12.4. Exporting dives from DivingLog 5.0

    -

    Unfortunately DivingLog XML files give us no -indication on the preferences set on your system. So in order for +

    12.3. Exporting dives from DivingLog 5.0

    +
    + + + +
    +Note +Unfortunately DivingLog XML files give us no +indication on the preferences set on one’s system. So in order for Subsurface to be able to successfully import XML files from DivingLog -you first need to make sure that your copy of DivingLog is configured -to use the Metric system (you can easily change this in File → +one first needs to ensure that DivingLog is configured +to use the Metric system (one can easily change this in File → Preferences → Units and Language by clicking the Metric -button). Then do the following:

    +button). Then do the following:
    +

    • @@ -3034,7 +3201,7 @@ In Divinglog open the File → Export → XML menu

    • -Select the dives that you want to export +Select the dives to export

    • @@ -3046,11 +3213,63 @@ Click on the export button and select the filename
    +
    +

    13. APPENDIX D: FAQs.

    +
    +
    +

    13.1. Subsurface appears to miscalculate gas consumption and SAC

    +

    Not really. What happens is that subsurface actually calculates gas +consumption differently - and better - than you expect. +In particular, it takes the incompressibility of the gas into account. +Traditionally, Gas consumption and SAC should be: +consumption = tank size x (start pressure - end pressure)

    +

    and that’s true for an ideal gas, and it’s what you get taught in dive theory. +But an "ideal gas" doesn’t actually exist, and real gases actually don’t compress +linearly with pressure. Also, you are missing the fact that one atmosphere of +pressure isn’t actually one bar. +So the real calculation is:

    +

    consumption = (amount_of_air_at_beginning - amount_of_air_at_end)

    +

    where the amount of air is not just "tank size times pressure in bar". +It’s a combination of: "take compressibility into account" (which is a fairly +small issue under 220 bar - you’ll see more differences when you do high-pressure +tanks with 300bar) and "convert bar to atm" (which is the majority of your discrepancy). +Remember: one ATM is ~1.013 bar, so without the compressibility, your gas use is:

    +

    12.2*((220-100)/1.013)

    +

    which is about 1445, not 1464. So there was 19 l too much in your simple +calculation that ignored the difference between 1 bar and one ATM. +The compressibility does show up above 200 bar, and takes that 1445 down +about eight liters more, so you really did use only about 1437 l of air at surface pressure. +The math details can be seen in dive.c:

    +

    surface_volume_multiplier().

    +

    The "if (bar > 200) bar = .." part is the compressibility - it’s an approximation, +but it’s a reasonably good one, and closer to reality than not doing it. +You can get the numbers you expect if you remove that, and turn the function into just:

    +

    return pressure.mbar / 1000.0;

    +

    but that would actually be wrong. +So be happy: your SAC really is better than your calculations indicated. +Or be sad: your cylinder contains less air than you thought it did. +And as mentioned, the "contains less air than you thought it did" really +starts becoming much more noticeable at high pressure. A 400 bar really does not +contain twice as much air as a 200 bar one. At lower pressures, air acts pretty much like an ideal gas.

    +
    +
    +

    13.2. Some dive profiles have time discrepances with the recorded samples from my dive computer…

    +

    Subsurface ends up ignoring surface time for many things (average depth, divetime, SAC, etc). + For example, if you end up doing a weight check (deep enough to trigger the "dive started") +but then come back up and wait five minutes for your buddies, your dive computer may say +that your dive is 50 minutes long - because you have fifty minutes worth of samples - but +subsurface will say it’s 45 minutes - because you were actually diving for 45 minutes. +It’s even more noticeable if you do things like divemastering the initial OW dives, when +you may stay in the water for a long time, but spend most of it at the surface. And then + you don’t want that to count as some kind of long dive”.

    +
    +
    +
    -- cgit v1.2.3-70-g09d2