| Acronym | Meaning |
 | AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| DM | Dive Master (PADI) |
| MDT | Maximum Dive Time |
| IDC | Instructor Development Course (PADI) |
| DIN | Deutsches Insitut Fuer Normung |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
| DCAP | Decompression Computation And Analysis Program |
| SWP | Safe Working Pressure |
| AIE | Advanced Instructor Exam (BSAC) |
| AIC | Advanced Instructor Course (BSAC) |
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