| Acronym | Meaning |
 | ITS | Instructor Training Scheme (BSAC) |
| LAT | Lowest Astonomical Tide |
| OW | Open Water Certification; First Certification Level. |
| MDL | No Decompression Limit |
| TNT | Total Nitrogen Time |
| HID | High Intensity Discharge |
| AMDT | Adjusted Maximum Dive Time |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| MSD | Master SCUBA Diver (PADI) |
| DIR | Doing It Right |
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