Underwater Abbreviations and Acronyms
- ANDIAmerican Nitrox Divisionrs Incorporated
- AODCAssociation of Offshore Divisionng Contractors
- AOWAdvanced Open Water
- APAbsolute Pressure
- APAmbient Pressure
- ASFAustralian Speleological Federation
- ATAtmosphere
- ATAAtmospheres Absolute
- ATEAAmphibian Tank Escape Apparatus
- ATMAtmosphere
- ATMOSAtmosphere
- AUFAustralian Underwater Federation
- AUSAmerican Academy of Underwater Sciences
- BCBuoyancy Compensator
- BCDBuoyancy Control Device
- BCDBuoyancy Compensator Device
- BCRABritish Cave Research Association
- BHABritish Hyperbaric Association
- BIBSBuilt-In Breathing System
- BPBackplate
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