| Acronym | Meaning |
 | TO | Training Officer (BSAC) |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| DCS | Decompression Sickness |
| OW(D) | Open Water (Diver) (PADI) |
| IDEA | International Diving Educators Association; Diving Instruction Organization. |
| CAGE | Cerebral Arterial Gas Embolism |
| DV | Demand Valve |
| CNS | Central Nervous System |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| C-CARD | Scuba Diving Certification Card. |
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