| Acronym | Meaning |
 | OWI | Open Water Instructor (BSAC) |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| VENTID | Vision Ears Nausea Twitiching Irritation Dizziness |
| GMDSS | Global Maritime Distress And Safety System |
| MDT | Maximum Dive Time |
| NI | National Instructor (BSAC) |
| MCA | Maritime And Coastguard Agency |
| NITROX | Any Gas Mixture Of Nitrogen And Oxygen; Though Most Commonly Used For Oxygen Mixtures Above The Normal 21 Per Cent. |
| DL | Dive Leader (BSAC) |
| PDIC | Professional Diving Instructors Corporation International; Diving Instruction Organization. |
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