| Acronym | Meaning |
 | PP | Partial Pressure |
| DM | Dive Master (PADI) |
| DV | Demand Valve |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| DCS | Decompression Sickness |
| IDEA | International Diving Educators Association; Diving Instruction Organization. |
| BHA | British Hyperbaric Association |
| TNT | Total Nitrogen Time |
| OWI | Open Water Instructor (BSAC) |
| ITW | Instructor Training Workshop (BSAC) |
Browse by Letter:
