| Acronym | Meaning |
 | HSE | Health And Safety Executive |
| DO | Dive Officer (BSAC) |
| MDT | Maximum Dive Time |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| MCA | Maritime And Coastguard Agency |
| OW(D) | Open Water (Diver) (PADI) |
| ITS | Instructor Training Scheme (BSAC) |
| ITW | Instructor Training Workshop (BSAC) |
| NASDS | National Association Of Scuba Diving Schools; Diving Instruction Organization. |
| ADT | Actual Dive Time |
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