| Acronym | Meaning |
 | ITC | Instructor Training Course (BSAC) |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| EO | Equipment Officer (BSAC) |
| BSAC | British Sub-Aqua Club |
| EAR | Expired Air Resuscitation |
| IDC | Instructor Development Course (PADI) |
| SAR | Search And Rescue/Recovery |
| SPG | Submerssible Pressure Guage |
| LAT | Lowest Astonomical Tide |
| DM | Dive Master (PADI) |
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