| Acronym | Meaning |
 | ITW | Instructor Training Workshop (BSAC) |
| DIR | Doing It Right |
| NI | National Instructor (BSAC) |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| BSAC | British Sub-Aqua Club |
| CCR | Closed Circuit Rebreather |
| OWIC | Open Water Instructor Course (BSAC) |
| AIE | Advanced Instructor Exam (BSAC) |
| RDP | Recreational Dive Planner |
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