| Acronym | Meaning |
| DL | Dive Leader (BSAC) |
| DCAP | Decompression Computation And Analysis Program |
| RDP | Recreational Dive Planner |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
| PPB | Peak Performance Bouyancy |
| NAUI | National Association Of Underwater Instructors |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| DPV | Diver Propulsion Vehicle |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| DIN | Deutsches Insitut Fuer Normung |