| Acronym | Meaning |
 | EAR | Expired Air Resuscitation |
| DCS | Decompression Sickness |
| OWIC | Open Water Instructor Course (BSAC) |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| GMDSS | Global Maritime Distress And Safety System |
| SAR | Search And Rescue/Recovery |
| IDEA | International Diving Educators Association; Diving Instruction Organization. |
| AGE | Aterial Gas Embolism |
| PG | Pressure Group |
| CAGE | Cerebral Arterial Gas Embolism |
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