| Had a similar conversation yesterday with "my instructor" and concluded that there should be more to the deco cylinder choice than just the amount of gas it contains.
Essentially it's a balance between cylinder portability, the amount of deco time you are prepared to build up, what your approach is to minimum gas, what you would do if you lost your deco gas.
If the tendency to take lots of deco gas, there is a tendency to perhaps rack up more deco by staying longer at depth using up more back gas, so if there is a "SHTF" incident there may not be enough gas to get you and your buddy up safely.
Rgrds
Mal |