| Acronym | Meaning |
 | ITS | Instructor Training Scheme (BSAC) |
| EAN(X) | Enriched Air Nitrox |
| CESA | Controlled Emergency Swimming Ascent |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| SWP | Safe Working Pressure |
| SPG | Submerssible Pressure Guage |
| IOC | Instructor Orientation Course (PADI) |
| C-CARD | Scuba Diving Certification Card. |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| PDIC | Professional Diving Instructors Corporation International; Diving Instruction Organization. |
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