novadiver
Contributor
Dan Gibson:Just go to northern Florida and look around. It ain't pretty. And yes, I am being serious. You will find some of the worst divers. Divers who have gone through some very quick and incomplete courses. Yes, there are good divers from the other agencies. No one will deny that. The problem is the other agencies do permit (maybe unwillingly) some instructors to put out what most of us would call crap. GUE certification isn't a given when you take the class. You do have to earn their card and must keep working at it to keep it. If you have a good instructor with one of the other agencies that won't settle for anything less than the best, more power to you, you probably just got excellent instruction. The problem is that the other agencies can't guarantee you will get that type of instructor.
I'd like to give you one very simple example (I have many more stories) of something I saw that seems all to typical down there. Two cave divers get in the water. They are arguing the whole time, so it's already off to a bad start. When they discuss gas management. One diver looks down at his SPG and says I have 3300 psi, my turn pressure is 2200 psi. The other states, I have 2400 psi, my turn pressure is 1600 psi. Then they descend. What in heck is that? Each of them just looked at there own SPG and assumed 1/3 was usable. No one determined who had the least amount of gas in order to calculate what the usable 1/3 would be. I can assure you that either these guys had become so complacent, or their instructors failed them miserably. I can assure you they were not GUE trained.
My instruction has been from PADI, TDI and GUE. The latter is far and away the most comprehensive.
Did both of these divers have the same CF size tanks? and do you think one diver would have proceded on when the other diver hit thirds? Or do you think that the diver with 3300 would have turned at 800 psi used?
Most divers down there know what the thirds rule is , and that it's the smaller of the tanks that controlles the dive. They also know about how to calc for differant size tanks. Maybe these divers have dove together so many times that they were a good team.( they were arguing, maybe they were freinds) It took me about one second to do the gas calcs in my head. It must take longer the GUE way, but it still adds up to the same. " the last third is not yours, It's your dive buddies"