| Acronym | Meaning |
 | TP | Test Pressure |
| DO | Dive Officer (BSAC) |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. |
| RNT | Residual Nitrogen Time |
| ITC | Instructor Training Course (BSAC) |
| TDT | Total Dive Time |
| OWI | Open Water Instructor (BSAC) |
| DCAP | Decompression Computation And Analysis Program |
| MCS | Marine Conservation Society |
| AIC | Advanced Instructor Course (BSAC) |
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