| Acronym | Meaning |
 | RD | Rescue Diver (PADI) |
| IOC | Instructor Orientation Course (PADI) |
| PSI | Pounds Per Square Inch |
| CESA | Controlled Emergency Swimming Ascent |
| PADI | Professional Association Of Diving Instructors |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| DCI | Decompression Illness |
| LP | Low Pressure |
| BFK | Big F*cking Knife (reference To The Diver's Knife) |
| IDC | Instructor Development Course (PADI) |
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