| Acronym | Meaning |
| ITS | Instructor Training Scheme (BSAC) |
| DIN | Deutsches Insitut Fuer Normung |
| DO | Dive Officer (BSAC) |
| DPV | Diver Propulsion Vehicle |
| DCS | Decompression Sickness |
| BT | Bottom Time |
| PADI | Professional Association Of Diving Instructors |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| EAR | Expired Air Resuscitation |