Diving Abbreviations “A”

These pages are provided by the DIVEInstruct web site as a guide to the abbreviations and terminology, used in diving and diving forums, purely as a guide.


It is not complete, and indeed never could be, as terminology changes and is added to all the time.  No responsibility is taken for any inaccuracies, although every care has been taken to make sure that the information is correct.


AA – Assisted Ascent


AAS – Alternative Air Source

ABC – Airway, Breathing, Circulation (casualty assessment)

ABT – Actual Bottom Time

ABLJ – Adjustable Buoyancy Life Jacket

ABI – Approved Boathandling Instructor (BSAC)


ACI – Assistant Club Instructor (BSAC)

ACUC – American Canadian Underwater Certification

AD – Advanced Diver (BSAC)

AD – Adventure Diver (PADI)


AED – Automatic Emergency Defibrillator

AI – Assistant Instructor (PADI)

AI – Advanced Instructor (BSAC)

AIC – Advanced Instructor Course (BSAC)

AIE – Advanced Instructor Exam (BSAC)

AISE – Association of Independent Scuba Educators

AIW – Advanced Instructor Workshop

AND – Advanced Nitrox Diver

ANDI – American Nitrox Divers International

AOW – Advanced Open Water (PADI)

AP – Ambient Pressure

AR – Ascent Rate

ASDA – Advanced Scuba Diving Association

ATA – Atmospheres Absolute

ATM – Atmosphere

AV – Artificial Ventilation

AVPU – Alert, Voice, Pain, Unresponsive (simplified consciousness assessment)

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