| Acronym | Meaning |
| DCI | Decompression Illness |
| MOD | Maximum Operating Depth |
| OWIC | Open Water Instructor Course (BSAC) |
| SI | Surface Interval |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| NAUI | National Association Of Underwater Instructors |
| ITC | Instructor Training Course (BSAC) |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| AIE | Advanced Instructor Exam (BSAC) |
| AGE | Aterial Gas Embolism |