This reminded of a situation we had here in Ontario last summer where three divers (two of whom I know/knew personally) were involved in an incident that ultimately resulted in the fatality of a reasonably experienced diver, who worked part-time at a well-respected shop, and who assisted with teaching. The initiating cause of his death: Acute Oxygen Toxicity.
There is nothing especially earth-shattering about this until you read that his maximum pO2 was "only" 1.49 ata. By most standards, this is only slightly more than the generally accepted level of 1.4 and well below the supposedly "tolerable" level of 1.6.
The reason I mention this here, is that presumably most of us know that there are numerous factors that influence a diver's susceptibility to a possible 02 hit. Of particular interest to photographers, might be the level of exertion...
How many times have you been hanging out on the edge of the wall when a flock of Eagle Rays flies past? We are too savvy to know not to chase them, but we are sure as heck going to try to keep up to grab that shot. And if they head down a little deeper, might you find yourself steaming along at the "acceptable" depth limit for the 32 mix, pushing a camera the size of a lunar lander.... and suddenly you are in trouble. And your non-photographer buddy is about 3 miles back!
Anyway, this isn't a forum to get too involved in safety talk, so let's just call it a friendly reminder... Check your mix... don't take the shop's word that it's ok. Watch your depth. Watch your level of exertion. And keep your butt in decent shape!
Stay safe friends!
The accident report is attached if you are interested in reading it...
Edited by Stoo, 21 March 2012 - 05:09 PM.