Quote: (Originally Posted by Red Sea Explorer)
The planned dive was for 10 to 15 at 90 meters.
The gas was 12/60 for Bottom, 1 bottom stage and a pumped set of double ALu 80 and 50 and 100% for Deco.
Min gas was 180 Bar on the back gas. Basically right after the stage.
The original Deco plan was 45 minutes. We added 5 minutes to the deco during the ascent to compensate for the extra bottom time and Depth. Should have added 15.
Dave and I have done this dive many times before. Maybe because we dive often our body is use to aggressive deco profiles. But our guest did not take it so well.
Thanks Joe for the advice on the In-water recompression rig. I believe it is a must on every tech diving boat. I myself am a strong believer in in-water recompression. We did administer oxegen on the surface a few times at diffirent intervals the day after.
I'm truly amazed you all did not get wacked and hard. The profile is so agressive its scary. A 15 min bottom time after a direct descent requires at least 70 minutes of decompression using a bubble model. I don't know where the profile you used came from but not a single model i have gives me that short a deco. Even if you only did 10 min on the bottom 50 min of deco would be in order.
The gas mixes you are using for decompression are way to shallow. Staying on the LOW po2 that long just does not give a clean efficient decompression. You may want to look at doing a gas shift to EAN 36 instead of 50% -- you will save some bottom mix and get to a more efficient off-gasing earlier.
But that's just my comments on it.
Cheers