| Acronym | Meaning |
 | AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| SAR | Search And Rescue/Recovery |
| AIE | Advanced Instructor Exam (BSAC) |
| EFR | Emergency First Response |
| OWSI | Open Water SCUBA Instructor (PADI) |
| DIN | Deutsches Insitut Fuer Normung |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| MOD | Maximum Operating Depth |
| NI | National Instructor (BSAC) |
| SWP | Safe Working Pressure |
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