Divers with poor training and bad practices often run out of gas while diving.
Well-trained divers have a high awareness of their consumption under water and are always checking the gauge.
Is it possible that a diver gets out of gas for breathing in spite of being always aware of its gas supply?
In order to respond this question we need first to go to the article of Advanced Diver Magazine called “Life Ending Seconds”, there we can see how much it takes to drain a dive tank when there is a failure in our equipment.
For example we see in the article that a second stage with a free flow can drain a dive tank in 155 seconds at 30 meters, if we are diving with a single tank at 30 meters and the flow starts when we have the tank with less than 206 bars then it’s impossible to get to the surface with enough gas.
Reading the article it’s clear that a failure in our equipment can let us without our gas supply very quickly, so the answer to the previous question is yes, even a good trained diver and with a lot of experience can get out of gas for breathing underwater.
This not only applies to divers with single tanks, diver with double tanks before isolate the tank with problems might lose enough gas to not be able to finish the dive.
This is one of the reasons why Team Work is so important, also maintain equipment in good condition and always execute:
- Dive planning.
- Gas consumption planning and reserve gas calculation.
- Dive equipment verification before the dive, who has what and where.
- Bubble check on the surface.
- Valves check on the surface.
- Second stages breath dry on surface.
- S-drill between 3 to 5 meters depth.
- Valve drill between 3 to 5 meters depth in the case of divers with double tanks.
- Dive the plan.
In the following video you can see the how Advanced Diver Magazine did the tests.