| Acronym | Meaning |
 | IOC | Instructor Orientation Course (PADI) |
| MDT | Maximum Dive Time |
| DV | Demand Valve |
| DCI | Decompression Illness |
| BHA | British Hyperbaric Association |
| PPB | Peak Performance Bouyancy |
| GPS | Global Positioing System |
| RIB | Rigid-Hulled Inflatable Boat |
| PADI | Professional Association Of Diving Instructors |
| IAND | International Association Of Nitrox Divers |
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