| Acronym | Meaning |
 | AOW | Advanced Open Water |
| RDP | Recreational Dive Planner |
| AMDT | Adjusted Maximum Dive Time |
| AIE | Advanced Instructor Exam (BSAC) |
| PSI | Pounds Per Square Inch |
| DM | Dive Master (PADI) |
| RNT | Residual Nitrogen Time |
| AIC | Advanced Instructor Course (BSAC) |
| SPG | Submerssible Pressure Guage |
| NASDS | National Association Of Scuba Diving Schools; Diving Instruction Organization. |
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