| Acronym | Meaning |
 | DV | Demand Valve |
| OW | Open Water Certification; First Certification Level. |
| MSD | Master SCUBA Diver (PADI) |
| BT | Bottom Time |
| RIB | Rigid-Hulled Inflatable Boat |
| SI | Surface Interval |
| PP | Partial Pressure |
| DCAP | Decompression Computation And Analysis Program |
| NI | National Instructor (BSAC) |
| DIN | Deutsches Insitut Fuer Normung |
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