| Acronym | Meaning |
 | END | Equivalent Narcotic Depth |
| ATA | Atmospheres Absolute |
| SWP | Safe Working Pressure |
| MDT | Maximum Dive Time |
| OWSI | Open Water SCUBA Instructor (PADI) |
| BCD | Buoyancy Control Device |
| DIR | Doing It Right |
| DIN | Deutsches Insitut Fuer Normung |
| DEMA | Diving Equipment Manufacturers Association |
| NI | National Instructor (BSAC) |
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