| Acronym | Meaning |
 | RYA | Royal Yachting Association |
| BT | Bottom Time |
| PPB | Peak Performance Bouyancy |
| PG | Pressure Group |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. |
| SAR | Search And Rescue/Recovery |
| ITC | Instructor Training Course (BSAC) |
| PADI | Professional Association Of Diving Instructors |
| ITW | Instructor Training Workshop (BSAC) |
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