| Acronym | Meaning |
 | ABT | Actual Bottom Time |
| AIC | Advanced Instructor Course (BSAC) |
| RIB | Rigid-Hulled Inflatable Boat |
| ATA | Atmospheres Absolute |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| OD | Ocean Diver (BSAC) |
| HSE | Health And Safety Executive |
| AGE | Aterial Gas Embolism |
| SSI | Scuba Schools International; Diving Instruction Organization. |
| SAA | Sub-Aqua Association |
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