| Air | Air is made up of approximately 20.95% Oxygen, O2, 78.08% Nitrogen, N2... |
| Absolute Pressure | Absolute pressure is calculated by using a vacuum as the zero point an... |
| Air Compressor | A machine that compresses or pressurizes air to fill your tanks before... |
| Ascent Bottle | An extra cylinder of air used on deep dives to allow decompression sto... |
| Artificial Spit | Small bottles of "special" liquid used by divers to keep their masks d... |
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