| Acronym | Meaning |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| EAR | Expired Air Resuscitation |
| SWP | Safe Working Pressure |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| HSE | Health And Safety Executive |
| BSAC | British Sub-Aqua Club |
| OWIC | Open Water Instructor Course (BSAC) |
| DAN | Divers Alert Network |
| ABT | Actual Bottom Time |
| SAR | Search And Rescue/Recovery |