| Acronym | Meaning |
| DIN | Deutsches Insitut Fuer Normung |
| DCS | Decompression Sickness |
| TDT | Total Dive Time |
| RYA | Royal Yachting Association |
| RIB | Rigid-Hulled Inflatable Boat |
| AMDT | Adjusted Maximum Dive Time |
| DO | Dive Officer (BSAC) |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| C-CARD | Scuba Diving Certification Card. |
| BWRAF | Buoyancy |