| Acronym | Meaning |
| DIR | Doing It Right |
| C-CARD | Scuba Diving Certification Card. |
| MCA | Maritime And Coastguard Agency |
| PG | Pressure Group |
| LP | Low Pressure |
| VGE | Venous Gas Embolism |
| OWIC | Open Water Instructor Course (BSAC) |
| BWRAF | Buoyancy |
| ITS | Instructor Training Scheme (BSAC) |
| OWI | Open Water Instructor (BSAC) |