diff options
| -rw-r--r-- | dive.c | 15 |
1 files changed, 11 insertions, 4 deletions
@@ -472,11 +472,18 @@ struct dive *fixup_dive(struct dive *dive) cyl->sample_end.mbar = 0; } } - if (end < 0) - { + if (end < 0) { /* Assume an ascent/descent rate of 9 m/min */ - int asc_desc_time = dive->maxdepth.mm*60/9000; - dive->meandepth.mm = dive->maxdepth.mm*(dive->duration.seconds-asc_desc_time)/dive->duration.seconds; + int depth = dive->maxdepth.mm; + int asc_desc_time = depth*60/9000; + int duration = dive->duration.seconds; + + /* Protect against insane dives - make mean be half of max */ + if (duration <= asc_desc_time) { + duration = 2; + asc_desc_time = 1; + } + dive->meandepth.mm = depth*(duration-asc_desc_time)/duration; return dive; } |