| Acronym | Meaning |
 | IDEA | International Diving Educators Association; Diving Instruction Organization. |
| DCS | Decompression Sickness |
| HSE | Health And Safety Executive |
| DSMB | Delayed Surface Marker Buoy |
| AGE | Aterial Gas Embolism |
| TO | Training Officer (BSAC) |
| ITS | Instructor Training Scheme (BSAC) |
| ITW | Instructor Training Workshop (BSAC) |
| RDP | Recreational Dive Planner |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
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