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I was trying to conceptualize how much air is inside a standard Aluminum 80 cylinder at 3000psi. Based on an old thread (Untangling cubic feet, litres, PSI, bar for scuba tanks and RMV / SAC calculations) it says that the actual volume inside of an Aluminum 80 is approximately 11 liters. But 11...

I would like to learn more skills for when my daughter is old enough to SCUBA (in 2 years). I also have Dive Instructor as a possible future early retirement job for myself. Certainly it sounds like I'd learn quite a bit. I have heard about liability insurance requirements for Dive Masters...

I have a desire to bring some supplies on scuba dives that need to stay dry. This can fit in about half of a gallon zip lock bag. I have tried a few simple methods to keep these items dry using some pretty serious zip lock bags and minimizing the air inside but no luck. Three different very...