| Acronym | Meaning |
| EFR | Emergency First Response |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| PSI | Pounds Per Square Inch |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
| ATA | Atmospheres Absolute |
| MCS | Marine Conservation Society |
| GMDSS | Global Maritime Distress And Safety System |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| DAN | Divers Alert Network |
| BCD | Buoyancy Control Device |