| Acronym | Meaning |
| SWP | Safe Working Pressure |
| PPB | Peak Performance Bouyancy |
| OWIC | Open Water Instructor Course (BSAC) |
| RDP | Recreational Dive Planner |
| AGE | Aterial Gas Embolism |
| LAT | Lowest Astonomical Tide |
| OW | Open Water Certification; First Certification Level. |
| TDT | Total Dive Time |
| SCUBA | Self Contained Underwater Breathing Aparatus |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) |