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I'm am an easy going guy, and unless what you are doing will directly result in death or injury to you or another diver, it's rather difficult to piss me off. However, there are certain things which will internally annoy me, but not necessarily make me treat you like a problem child.
. . .
-100 dive divers. These folks annoy me to know end because they've usually done enough dives to be decent divers, but suddenly seem to decided they have mastered all there is to learn. They always know everything about anything in diving, and are dead sure what they learned at location A applies completely and utterly to location B. After all, how can my diving be anything but perfect after 100 dives?
I really don't see what the big crisis is if a DM on a boat checks the tank right before I jump off. It's their job and it's automatic. I see them doing it to every diver before me so it's not a surprise. I'm sure they know which way to turn the knob.
A DM that doesn't know which way to turn a valve? Oh, come on!
Absolutely rediculous.
Not all valves are standard. One of my dive buddies had their air turned OFF by the DM right as she was getting in the water. The valve was a non-standard valve from a set of doubles taken apart. Quick thinking by another buddy who noticed this resolved the situation but could have been bad.
If I were wearing non-standard equipment, and I saw that the DM was checking valves, I like to think I would tell the DM what I had and how to check it. At the least I would have my buddy near by so they could explain and possibly double check. Not pointing fingers, just saying.
RichH