| Acronym | Meaning |
 | BFK | Big F*cking Knife (reference To The Diver's Knife) |
| DIN | Deutsches Insitut Fuer Normung |
| IAND | International Association Of Nitrox Divers |
| MDL | No Decompression Limit |
| HID | High Intensity Discharge |
| SAA | Sub-Aqua Association |
| END | Equivalent Narcotic Depth |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| IDC | Instructor Development Course (PADI) |
| OWI | Open Water Instructor (BSAC) |
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