| Acronym | Meaning |
 | MSDT | Master SCUBA Diver Trainer (PADI) |
| SPG | Submerssible Pressure Guage |
| ITC | Instructor Training Course (BSAC) |
| PDIC | Professional Diving Instructors Corporation International; Diving Instruction Organization. |
| ITW | Instructor Training Workshop (BSAC) |
| HPNS | High Pressure Nervous Syndrome |
| IDC | Instructor Development Course (PADI) |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| CESA | Controlled Emergency Swimming Ascent |
| RNT | Residual Nitrogen Time |
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