| Acronym | Meaning |
 | NAUI | National Association Of Underwater Instructors |
| LP | Low Pressure |
| ITC | Instructor Training Course (BSAC) |
| SWP | Safe Working Pressure |
| IOC | Instructor Orientation Course (PADI) |
| CMAS | Confederation Moniale Des Activities Subaquatiques |
| AMDT | Adjusted Maximum Dive Time |
| OW | Open Water Certification; First Certification Level. |
| SI | Surface Interval |
| GMDSS | Global Maritime Distress And Safety System |
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