| Acronym | Meaning |
 | OWIC | Open Water Instructor Course (BSAC) |
| SCUHA | Self-contained Underwater Heating Apparatus (urinating In Your Wet Suit). |
| CESA | Controlled Emergency Swimming Ascent |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |
| DIR | Doing It Right |
| DCAP | Decompression Computation And Analysis Program |
| C-CARD | Scuba Diving Certification Card. |
| GPS | Global Positioing System |
| EAN(X) | Enriched Air Nitrox |
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