| Acronym | Meaning |
 | EFR | Emergency First Response |
| CCR | Closed Circuit Rebreather |
| RDP | Recreational Dive Planner |
| DCAP | Decompression Computation And Analysis Program |
| DV | Demand Valve |
| SAA | Sub-Aqua Association |
| MDT | Maximum Dive Time |
| AIC | Advanced Instructor Course (BSAC) |
| DM | Dive Master (PADI) |
| MSD | Master SCUBA Diver (PADI) |
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