I don't know of ANY boat that doesn't count isolated manifoled doubles as a redundant gas supply.. I havent ever been not allowed to dive on any boat NY or NJ...
My point was that the gas capacity of twin 95s is huge.. You could do it with 80s it would still work but I don't like the characteristics of al 80s.. at the proposed RMV you would need 90cft of gas for each dive of 30 minutes, so obviously an 80 wouldn't cut it.
I used a high rmv since you are most likely a new diver.. I can easily get 1 hour total dive time at 100ft and still have lots of reserves..
My RMV is around .5 cft/min at the surface, so at 100 it would be 2cft per minute, 60minutes uses 120cft of 190cft in total.
with an overfil to just 3000psi I could get (3) 30 min dives to 100 and have 36cft of gas left.. I'd be starting with 216cft of gas and would be on board after the last dive with 500 PSI in the tank which still meets the thirds rule and then some...
My point was that the gas capacity of twin 95s is huge.. You could do it with 80s it would still work but I don't like the characteristics of al 80s.. at the proposed RMV you would need 90cft of gas for each dive of 30 minutes, so obviously an 80 wouldn't cut it.
I used a high rmv since you are most likely a new diver.. I can easily get 1 hour total dive time at 100ft and still have lots of reserves..
My RMV is around .5 cft/min at the surface, so at 100 it would be 2cft per minute, 60minutes uses 120cft of 190cft in total.
with an overfil to just 3000psi I could get (3) 30 min dives to 100 and have 36cft of gas left.. I'd be starting with 216cft of gas and would be on board after the last dive with 500 PSI in the tank which still meets the thirds rule and then some...