| Acronym | Meaning |
 | CCR | Closed Circuit Rebreather |
| TP | Test Pressure |
| HID | High Intensity Discharge |
| MDT | Maximum Dive Time |
| SAA | Sub-Aqua Association |
| EAR | Expired Air Resuscitation |
| SSI | Scuba Schools International; Diving Instruction Organization. |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| PPB | Peak Performance Bouyancy |
| SAR | Search And Rescue/Recovery |
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