| Acronym | Meaning |
 | C-CARD | Scuba Diving Certification Card. |
| AMDT | Adjusted Maximum Dive Time |
| OWIC | Open Water Instructor Course (BSAC) |
| MSDT | Master SCUBA Diver Trainer (PADI) |
| DIR | Doing It Right |
| SI | Surface Interval |
| SCUDA | Self Contained Underwater Drinking Apparatus. Product That Can Be Used To Drink Underwater. |
| PP | Partial Pressure |
| MDL | No Decompression Limit |
| OWI | Open Water Instructor (BSAC) |
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