What air level indicates your dive is done?
- Thread starter mchiapetto
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I voted for "sucking the paint off the outside of my tank".
But seriously, my desision to surface has a lot to do with the dive profile. The deeper you go, the longer it takes to surface. Deco stops are another obvious factor. However, safety is the primary driving force in making the decision to surface. For example. At the end of a shore dive, with 600 lbs. left in the tanks, we decided to just poke around in 5' of water and play with the fishes for a while. We sucked the air down to about 150 lbs. Now were we in danger? Absolutely not! All we had to do was stand up and we would be out of the water. Would it be wise to run your tank down to 150 lbs. in 20 - 30 ' of water? No, it would not be wise, in fact it would be both stupid and dangerous. The bottom line here is use some common sence and always have reserve air when ending a diving.
But seriously, my desision to surface has a lot to do with the dive profile. The deeper you go, the longer it takes to surface. Deco stops are another obvious factor. However, safety is the primary driving force in making the decision to surface. For example. At the end of a shore dive, with 600 lbs. left in the tanks, we decided to just poke around in 5' of water and play with the fishes for a while. We sucked the air down to about 150 lbs. Now were we in danger? Absolutely not! All we had to do was stand up and we would be out of the water. Would it be wise to run your tank down to 150 lbs. in 20 - 30 ' of water? No, it would not be wise, in fact it would be both stupid and dangerous. The bottom line here is use some common sence and always have reserve air when ending a diving.
Duncan Price
Contributor
Yes - sort of - I'm a cave (sump) diver from the UK and Mike is from the US. I've absolutely no interest in open water diving, wrecks, fish or whatever. I suppose I should introduce myself on the "introductions" board.
Duncan
willanz
Guest
Duncan, Mike you didn't tell them...
How do you know when its time to end a cave dive?
When the tanks are full!
Some of us use Low pressure steel tanks stamped at 2400 PSI.
Whe the gauge reads the stamped pressure....we turn around.
How do you know when its time to end a cave dive?
When the tanks are full!
Some of us use Low pressure steel tanks stamped at 2400 PSI.
Whe the gauge reads the stamped pressure....we turn around.
skipjack28
Guest
When the gauge reads the stamped pressure....we turn around.
How far do you overfill them to start with?
willanz
Guest
We turn at 2/3 of our available gas supply.
Actually, my wife uses hp 100's and I use lp 104's we match gas an I turn before mine are full.
But to answer your question I thought I might open a can of worms by bringing up "cave" fills and how to apply the rule of thirds at hydro presures. Nobody ever died from having too much gas.
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