| Acronym | Meaning |
| DM | Dive Master (PADI) |
| AIE | Advanced Instructor Exam (BSAC) |
| END | Equivalent Narcotic Depth |
| AGE | Aterial Gas Embolism |
| VGE | Venous Gas Embolism |
| CAGE | Cerebral Arterial Gas Embolism |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| HSE | Health And Safety Executive |
| PADI | Professional Association Of Diving Instructors |
| DCI | Decompression Illness |