| Acronym | Meaning |
 | RD | Rescue Diver (PADI) |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| ITW | Instructor Training Workshop (BSAC) |
| TO | Training Officer (BSAC) |
| AOW | Advanced Open Water |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| AMDT | Adjusted Maximum Dive Time |
| BWRAF | Buoyancy |
| CAGE | Cerebral Arterial Gas Embolism |
| NASDS | National Association Of Scuba Diving Schools; Diving Instruction Organization. |
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