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I was never taught a standard hand signal. My family has always used the right thumb into the horizontal left palm (ie ceiling) followed by a hand signal for remaining time identical to air pressure remaining but in minutes, generally with one hand. We all dive the same decompression algorithm (Oceanic DSAT), so our NDL times are never very different. We probably would not ask unless our own NDL was reasonably low, few minutes. We use no signal for the safety stop as it is a given.
I generally go over this hand signal with assigned buddies when applicable. This is particularly important with significantly different decompression algorithms, ie. Suunto.
Good diving, Craig
I generally go over this hand signal with assigned buddies when applicable. This is particularly important with significantly different decompression algorithms, ie. Suunto.
Good diving, Craig