| Acronym | Meaning |
| AGE | Aterial Gas Embolism |
| AIE | Advanced Instructor Exam (BSAC) |
| NI | National Instructor (BSAC) |
| IAND | International Association Of Nitrox Divers |
| MDT | Maximum Dive Time |
| AIC | Advanced Instructor Course (BSAC) |
| CESA | Controlled Emergency Swimming Ascent |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| EFR | Emergency First Response |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |