| Acronym | Meaning |
| EFR | Emergency First Response |
| 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 |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. |
| TDT | Total Dive Time |
| OWSI | Open Water SCUBA Instructor (PADI) |
| DIR | Doing It Right |
| DAN | Divers Alert Network |
| IDC | Instructor Development Course (PADI) |
| RIB | Rigid-Hulled Inflatable Boat |