| Acronym | Meaning |
 | NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| PPB | Peak Performance Bouyancy |
| OWIC | Open Water Instructor Course (BSAC) |
| ITW | Instructor Training Workshop (BSAC) |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| DO | Dive Officer (BSAC) |
| IOC | Instructor Orientation Course (PADI) |
| BT | Bottom Time |
| HSE | Health And Safety Executive |
| CAGE | Cerebral Arterial Gas Embolism |
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