| Acronym | Meaning |
 | PDIC | Professional Diving Instructors Corporation International; Diving Instruction Organization. |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| RNT | Residual Nitrogen Time |
| BC | Bouyancy Compensator |
| AAS | Alternate Air Source |
| BT | Bottom Time |
| ITC | Instructor Training Course (BSAC) |
| AIE | Advanced Instructor Exam (BSAC) |
| DCAP | Decompression Computation And Analysis Program |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
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