| Acronym | Meaning |
 | AGE | Aterial Gas Embolism |
| OW(D) | Open Water (Diver) (PADI) |
| HPNS | High Pressure Nervous Syndrome |
| DSMB | Delayed Surface Marker Buoy |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
| ITC | Instructor Training Course (BSAC) |
| SI | Surface Interval |
| DV | Demand Valve |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| EAR | Expired Air Resuscitation |
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