| Acronym | Meaning |
 | MCA | Maritime And Coastguard Agency |
| LP | Low Pressure |
| OW(D) | Open Water (Diver) (PADI) |
| AGE | Aterial Gas Embolism |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| OWIC | Open Water Instructor Course (BSAC) |
| END | Equivalent Narcotic Depth |
| C-CARD | Scuba Diving Certification Card. |
| AIE | Advanced Instructor Exam (BSAC) |
| PSI | Pounds Per Square Inch |
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