| Acronym | Meaning |
 | PSI | Pounds Per Square Inch |
| DM | Dive Master (PADI) |
| OD | Ocean Diver (BSAC) |
| NAUI | National Association Of Underwater Instructors |
| MDL | No Decompression Limit |
| AMDT | Adjusted Maximum Dive Time |
| SAR | Search And Rescue/Recovery |
| CAGE | Cerebral Arterial Gas Embolism |
| OWI | Open Water Instructor (BSAC) |
| DSMB | Delayed Surface Marker Buoy |
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