| Acronym | Meaning |
| MDT | Maximum Dive Time |
| DAN | Divers Alert Network |
| END | Equivalent Narcotic Depth |
| LP | Low Pressure |
| ROV | Remotly Operated Vehicle |
| OWIC | Open Water Instructor Course (BSAC) |
| NI | National Instructor (BSAC) |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| ABT | Actual Bottom Time |