| Acronym | Meaning |
 | AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| DIN | Deutsches Insitut Fuer Normung |
| RDP | Recreational Dive Planner |
| LAT | Lowest Astonomical Tide |
| SWP | Safe Working Pressure |
| BWRAF | Buoyancy |
| GPS | Global Positioing System |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| DO | Dive Officer (BSAC) |
| DEMA | Diving Equipment Manufacturers Association |
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