| Acronym | Meaning |
 | BHA | British Hyperbaric Association |
| BCD | Buoyancy Control Device |
| LP | Low Pressure |
| SPG | Submerssible Pressure Guage |
| CCR | Closed Circuit Rebreather |
| RIB | Rigid-Hulled Inflatable Boat |
| HP | High Pressure |
| DIR | Doing It Right |
| OD | Ocean Diver (BSAC) |
| GMDSS | Global Maritime Distress And Safety System |
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