| OW | = | Open Water |
| OWC | = | Open Water Class |
| OWP | = | Open Water Pool |
| OWT | = | Open Water Training |
| AOW | = | Advanaced Open Water |
| MFA | = | First Aid or CPR (Call to confirm which) |
| RES | = | Rescue |
| DRS | = | Drysuit |
| NO1 | = | Nitrox 1 |
| NO2 | = | Nitrox 2 |
| WRK | = | Wreck |
| EQU | = | Equipment |
| NO3 | = | Decompression Procedures |
| NO4 | = | Advanced Nitrox (Accelerated Decompression) |
| EXR | = | Extended Range |
| PHO | = | Photography / Videography |
| DET | = | DeepTec |
| TMX | = |
Trimix |
| BOD | = | Boat Dive |
| BED | = | Beach Dive |
| NID | = | Night Dive |
| B8 | = | Beach 8th St, Far Rockaway |
| DS | = | Dutch Springs, Bethlehem PA |
| EN | = | Eagle's Nest; East Marina, Point Lookout |
| LN | = | Lock Ness; Freeport |