| Acronym | Meaning |
| C-CARD | Scuba Diving Certification Card. |
| DCI | Decompression Illness |
| AIC | Advanced Instructor Course (BSAC) |
| AOW | Advanced Open Water |
| IOC | Instructor Orientation Course (PADI) |
| RYA | Royal Yachting Association |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| DEMA | Diving Equipment Manufacturers Association |
| OWI | Open Water Instructor (BSAC) |
| AGE | Aterial Gas Embolism |