| Acronym | Meaning |
 | DO | Dive Officer (BSAC) |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. |
| IOC | Instructor Orientation Course (PADI) |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| HID | High Intensity Discharge |
| BCD | Buoyancy Control Device |
| TNT | Total Nitrogen Time |
| SAR | Search And Rescue/Recovery |
| CCR | Closed Circuit Rebreather |
| PG | Pressure Group |
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