WetLens
Contributor
I had a recent experience with my Wisdom II that really concerns me. First, let me say that I screwed up. I should have been watching my time/depth more attentively and not gotten myself close to deco. My bad, no question. However, how does one go from just flipping into deco at 45' and wind up with 44 minutes of 10' stop time 5 minutes later - while ascending? This makes no sense.
Situation: 4th dive of the day and started the dive with 5 NIBR. 1:08 into the dive (avg depth 47') went into deco (current depth - 46'; deco obligation - 4 minutes). Notified my buddy of the need to ascend and began ascent at 1:10 (current depth - 44'; deco obligation - 24 minutes!). Hit roughly 10' at 1:13 well within ascent rate deco obligation 43 minutes!!!!!
Again, looking at the profile, I know that I was it was too deep/too long of a dive for a fourth dive of the day. I was not watching my depth/time closely enough to avoid deco. I understand all of that. What I don't understand is how I can incur 43 minutes of deco obligation after just 5 minutes in deco. I can find no basis for that in any modeling that I've done.
I did breath out the tank at 10'; returned to the dive center and got at 32% nitrox tank and returned to depth for well in excess of the noted deco obligation. Needless to say, the computer was locked out until the clock cleared a couple of days later (continued to dive with backup computer).
Attached is spreadsheet with download data and graph of dive. Can you shed any light on what would cause this?
Situation: 4th dive of the day and started the dive with 5 NIBR. 1:08 into the dive (avg depth 47') went into deco (current depth - 46'; deco obligation - 4 minutes). Notified my buddy of the need to ascend and began ascent at 1:10 (current depth - 44'; deco obligation - 24 minutes!). Hit roughly 10' at 1:13 well within ascent rate deco obligation 43 minutes!!!!!
Again, looking at the profile, I know that I was it was too deep/too long of a dive for a fourth dive of the day. I was not watching my depth/time closely enough to avoid deco. I understand all of that. What I don't understand is how I can incur 43 minutes of deco obligation after just 5 minutes in deco. I can find no basis for that in any modeling that I've done.
I did breath out the tank at 10'; returned to the dive center and got at 32% nitrox tank and returned to depth for well in excess of the noted deco obligation. Needless to say, the computer was locked out until the clock cleared a couple of days later (continued to dive with backup computer).
Attached is spreadsheet with download data and graph of dive. Can you shed any light on what would cause this?