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There are a number of different gases for diving.
Most commonly, air is used for recreational diving. Sometimes, nitrox is used which is a higher proportion of oxygen. This is usually 30-35% oxygen instead of the ~20% in air. This has the benefit of less nitrogen so less "on-gassing". This increases the bottom time and reduces the decompression stops.
For commercial diving, there are a number of other gases used such as Trimix which I believe has Helium in it.
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Is scuba diving in mid air possible?
seriously? it is not diving and you don't scuba to breath in air.
Mixture of gases for scuba diving tanks compared to normal atmospheric air?
Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.
How much does scuba gear weigh?
Different scuba gear types weigh different amounts. The oxygen tank is the heavy part of the scuba diving gear.
What can a scuba diver purchase from the Air Hog online shop?
A scuba diver can purchase many things for scuba diving at the Air Hog online shop. They can purchase dive knives, dive lights, dive computers, and dive bags which will help them in scuba diving.
Why does a scuba diver need increased gas in the air tank?
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
How can you fill a tank of compressed air without an air compresser?
You can use a scuba tank, but that is it.
What should scuba air smell like?
Compressed air used for SCUBA should smell like regular air. There may be a slight rubber smell from the regulator. When in doubt, it is safer to get your tank refilled than to dive on contaminated air.
A device that supplies air to under water swimmers?
scuba
What is the vest that you wear in scuba diving called and what is its purpose?
The vest is simply called a scuba vest. It's to hold your air tank and regulators :)
Which apparatus can you use to that water contains air?
Scuba Breathing Apparatus.
What is the scuba sign for no air?
Drawing your finger/hand across your throat.
What is the acceptable level of SCUBA AIR cylinder contamination?
one percent
