| Acronym | Meaning |
 | GMDSS | Global Maritime Distress And Safety System |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| SPG | Submerssible Pressure Guage |
| ADT | Actual Dive Time |
| IDC | Instructor Development Course (PADI) |
| AIC | Advanced Instructor Course (BSAC) |
| RDP | Recreational Dive Planner |
| DPV | Diver Propulsion Vehicle |
| END | Equivalent Narcotic Depth |
| BC | Bouyancy Compensator |
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