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"I did analyse it, I just forgot to mark it."
I recently had a new tank monkey at a local shop who would only fill my double lp108's to 2200 since it didn't have the +. They normally fill to 3000, and I usually want at least 2640. 180 cubic feet instead of 216 cubic feet could make a big difference in dive plan.Why? I use steel cylinders and don't feel the need to overfill them. My gas planning assumes a low fill before a dive. Unless you fill them yourself you are at the mercy of a tank mokey anyway. (Speaking as someone who has been a tank monkey).
really can that happen - i.e. doing full cave without AOW
Did you ever notice that some of the biggest lies are revenue creating?
It is a sign of panicked diver sometimes. More often, it is a sign of a diver who is going to lose a mask.
I did not draw the conclusion that every diver with a mask on the forehead is panicked, you did that. I made the assumption that every diver who is panicked removes their mask, often by placing it on their forehead.
Not just in scuba, but life in general....
"Trust me, I know what I'm doing...."