| AA | Assisted Ascent | - | SMS Chat and Text |
| AAS | Alternate Air Source | - | SMS Chat and Text |
| ABT | Actual Bottom Time | - | SMS Chat and Text |
| AD | Adventure Diver (PADI) Advanced Diver (BSAC) | - | SMS Chat and Text |
| ADT | Actual Dive Time | - | SMS Chat and Text |
| AGE | Aterial Gas Embolism | - | SMS Chat and Text |
| AI | Assistant Instructor (PADI) Advanced Instructor (BSAC) | - | SMS Chat and Text |
| AIC | Advanced Instructor Course (BSAC) | - | SMS Chat and Text |
| AIE | Advanced Instructor Exam (BSAC) | - | SMS Chat and Text |
| AMDT | Adjusted Maximum Dive Time | - | SMS Chat and Text |
| AOW | Advanced Open Water | - | SMS Chat and Text |
| ATA | Atmospheres Absolute | - | SMS Chat and Text |
