| Acronym | Meaning |
 | AMDT | Adjusted Maximum Dive Time |
| ITW | Instructor Training Workshop (BSAC) |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| DPV | Diver Propulsion Vehicle |
| NASDS | National Association Of Scuba Diving Schools; Diving Instruction Organization. |
| SI | Surface Interval |
| GPS | Global Positioing System |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| DAN | Divers Alert Network |
| IOC | Instructor Orientation Course (PADI) |
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