| Acronym | Meaning |
| CNS | Central Nervous System |
| BT | Bottom Time |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| DAN | Divers Alert Network |
| ADT | Actual Dive Time |
| GMDSS | Global Maritime Distress And Safety System |
| NASDS | National Association Of Scuba Diving Schools; Diving Instruction Organization. |
| PG | Pressure Group |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| DCAP | Decompression Computation And Analysis Program |