| Acronym | Meaning |
| IOC | Instructor Orientation Course (PADI) |
| DIN | Deutsches Insitut Fuer Normung |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| DCAP | Decompression Computation And Analysis Program |
| BWRAF | Buoyancy |
| AIC | Advanced Instructor Course (BSAC) |
| LP | Low Pressure |
| AMDT | Adjusted Maximum Dive Time |
| RD | Rescue Diver (PADI) |
| ITS | Instructor Training Scheme (BSAC) |