| Acronym | Meaning |
| ADT | Actual Dive Time |
| DCI | Decompression Illness |
| AMDT | Adjusted Maximum Dive Time |
| TP | Test Pressure |
| LP | Low Pressure |
| OWIC | Open Water Instructor Course (BSAC) |
| RIB | Rigid-Hulled Inflatable Boat |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| CESA | Controlled Emergency Swimming Ascent |