| Acronym | Meaning |
| SAR | Search And Rescue/Recovery |
| EAR | Expired Air Resuscitation |
| ATA | Atmospheres Absolute |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| CESA | Controlled Emergency Swimming Ascent |
| VGE | Venous Gas Embolism |
| RNT | Residual Nitrogen Time |
| SI | Surface Interval |
| GMDSS | Global Maritime Distress And Safety System |
| PP | Partial Pressure |