From 3cf59fbd128648c4126abaa10e8223147056a9a0 Mon Sep 17 00:00:00 2001
From: Dirk Hohndel
-Below is the profile of a dive to 21 m for 31 min and with a switch from air to -EAN50 at 20m after 31 minutes. In this case the first cylinder in the Equipment tab +
Below is the profile of a dive to 20 m for 30 min and with a switch from air to +EAN50 at 5 m. In this case the first cylinder in the Equipment tab contained air and the second cylinder contained EAN50.
After editing and saving a dive location (see C above), one needs to upload it to the web -service, as explained above.
General Settings, under the HTML tab, provides the following options: @@ -2723,8 +2723,6 @@ size and theme.
Export to other formats can be achieved through third party facilities, for instance www.divelogs.de.
-The planning is performed in three stages: -
+The planning is performed in three stages:
@@ -3142,16 +3136,15 @@ as well as the gradient factors (GFLow and GFHigh) under the headings Rates< to the bottom left of the planning screen. Initially, the GFHigh and GFLow values in the Preferences panel of Subsurface is used. If these are changed within the planner (see Gas Options within the planner), the new values are -used without changing the original specifications in the Preferences. -
-Gradient Factor settings strongly affect the calculated ceilings and their depths. +used without changing the original specifications in the Preferences. Gradient Factor settings strongly affect the calculated ceilings and their depths. A very low GFLow value brings about decompression stops early on during the dive. +
+For more information about Gradient factors, see the section on Gradient Factor Preference settings. -For more information external to this manual see:
@@ -3169,6 +3162,8 @@ For more information external to this manual see:
The ascent rate is critical for nitrogen off-gassing at the end of the dive and is specified @@ -3180,6 +3175,8 @@ is activated, then the descent phase of the planned dive will be at the maximal in the Rates section of the dive setup.
b) Oxygen management: In the Gas Options part of the dive specification, the maximum partial @@ -3187,14 +3184,11 @@ pressure for oxygen needs to be specified for the bottom part of the dive (bottom po2) as well as for the decompression part of the dive (deco po2). The most commonly used values are 1.4 bar for the bottom part of the dive and 1.5 bar for any decompression -stages. Normally, a partial pressure of 1.5 bar is not exceeded. +stages. Normally, a partial pressure of 1.5 bar is not exceeded. PO2 settings and the depth at which switching to a gas takes place can also be edited in the +Available Gases dialog. Normally the planner decides on switching to a new gas when, during +ascent, the partial pressure of the new gas has decreased to 1.6 bar.
Po2 settings and the depth at which switching to a gas takes place can also be edited in the -Available Gases dialog. Normally the planner decides on switching to a new gas when, during -ascent, the partial pressure of the new gas has decreased to 1.6 bar.
c) Gas management: One needs keep within the limits of the amount of gas contained in the dive @@ -3211,7 +3205,7 @@ if one exceeds the total amount of gas available. Good practice demands that one the limit of the gas supply but that an appropriate reserve is kept for unforeseen circumstances. For technical diving, this reserve can be up to 66% of the total available gas.
-Now (at last) one can start the detailed time-depth planning of the dive. Subsurface offers a unique @@ -3262,8 +3256,6 @@ manually creating a gas change by right-clicking on the appropriate waypoint.
Below is an example of a dive plan to 45m using EAN26, followed by an ascent using EAN50 and using the settings as described above.