| Acronym | Meaning |
 | BSAC | British Sub-Aqua Club |
| OW(D) | Open Water (Diver) (PADI) |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| EFR | Emergency First Response |
| AAS | Alternate Air Source |
| NAUI | National Association Of Underwater Instructors |
| DM | Dive Master (PADI) |
| DEMA | Diving Equipment Manufacturers Association |
| CNS | Central Nervous System |
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