| Acronym | Meaning |
 | BHA | British Hyperbaric Association |
| EAR | Expired Air Resuscitation |
| PDIC | Professional Diving Instructors Corporation International; Diving Instruction Organization. |
| RDP | Recreational Dive Planner |
| BC | Bouyancy Compensator |
| AA | Assisted Ascent |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| OW(D) | Open Water (Diver) (PADI) |
| IOC | Instructor Orientation Course (PADI) |
| DV | Demand Valve |
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