55
feet for 46 minutes ->HANSWER
Group H
60 feet for 40 minutes -> Group G
Group G on the surface for 1:30 ->E
Group E at 55 feet (must use 60); max time -> 20 (so 16 minutes is o.k.).
Residual Nitrogen time is 30 minutes. Add RNT (residual nitrogen time) to
ABT (actual bottom time) of 16 to get 46 minutes.
55
feet for 46 minutes ->H
