Ericlt1
Contributor
My friend insists that on a vacation, an instructor took him down to 50m. He was using an al80. He says the dive was 25 minutes long. The dive tables only go to 39m. What is the deal? Thanks.
50-60m recreational depth?
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50 meters is ~164'. Outside the recreational limit of any agency I know of. A bit ill-advised as well.
25 minute total dive time maybe. 25 minute bottom time at depth on an AL80, doubtful.
The instructor may have taken him to that depth, but I wouldn't call it "recreational." Maybe he was doing an advanced class? Deco procedures?
25 minute total dive time maybe. 25 minute bottom time at depth on an AL80, doubtful.
The instructor may have taken him to that depth, but I wouldn't call it "recreational." Maybe he was doing an advanced class? Deco procedures?
50m works out to about 164fsw. Definately well beyond what would be considered recreational. I would consider attempting a dive to this depth on a single al 80 reckless and irresponsible. An Instructor taking someone (presumably not T certified) to this depth, I would consider negligent. But that's just my opinion. I've heard of dumber things, but not by much.
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Then your friend is either embellishing the truth, or had a dangerous fool for a buddy.
With an assumed breathing rate of .5 cfm, he would have consumed about 74.50 cf of gas just during the bottom time. Not to mention the descent time, ascent time and the necessary deco time. Highly unlikely.
Rainer
Contributor
Sounds like a profile we do often. 25 minutes at 160' on an Al80.
[Now, we usually switch back to the doubles for the ascent, before settling in for 30 minutes of deco on another bottle...]
[Now, we usually switch back to the doubles for the ascent, before settling in for 30 minutes of deco on another bottle...]
lol...
He probably just followed the leader (by him saying the instructor TOOK him to 50m - any thinking diver would be able to read thier own gauges...otherwise he would have said "I" dove to 50m) and didn't understand that he was diving to 50'. Sometimes accents, the instructor switching between feet/M in his lingo depending on the crowd he's leading and your friend got confused.
Think your friend is pulling your leg.
I would lay money on 50 ft not M.
Often hear mistakes made by people who talk in imperial talking with others who work in metric.
I would lay money on 50 ft not M.
Often hear mistakes made by people who talk in imperial talking with others who work in metric.
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