Here is a list of some common terms and acronyms used in the diving industry:
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SCUBA: Self-Contained Underwater Breathing Apparatus
BCD: Buoyancy Control Device
NDL: No Decompression Limit
RNT: Residual Nitrogen Time
RDP: Recreational Dive Planner
SAC: Surface Air Consumption
TBT: Total Bottom Time
TTS: Time To Surface
PADI: Professional Association of Diving Instructors
NAUI: National Association of Underwater Instructors
SSI: Scuba Schools International
DAN: Divers Alert Network
O2: Oxygen
PO2: Partial Pressure of Oxygen
MOD: Maximum Operating Depth
EAD: Equivalent Air Depth
EANx: Enriched Air Nitrox (a type of diving gas)
DEP: Dive Emergency Plan
DCS: Decompression Sickness
CCR: Closed Circuit Rebreather
MSD: Maximum Surface Decompression
PSI: Pounds per square inch
HPNS: High-Pressure Nervous Syndrome
ADAS: Australian Diver Accreditation Scheme
BHA: Breathing Hose Assembly
COW: Configuration of the Water
DPV: Dive Propulsion Vehicle
DSAT: Diving Science and Technology Corporation
DCIEM: Defense and Civil Institute of Environmental Medicine
FIO2: Fraction of Inspired Oxygen
FO2: Fraction of Oxygen
GUE: Global Underwater Explorers
HSE: Health and Safety Executive
IANTD: International Association of Nitrox and Technical Divers
IDC: Instructor Development Course
IHMP: Incident Management and Medical Procedures
JDC: Junior Dive Control
JHA: Job Hazard Analysis
JSA: Job Safety Analysis
MSD: Maximum Surface Decompression
OOA: Out Of Air
PSCR: Primary Surface Control Regulator
SAC: Surface Air Consumption
SDC: Surface Decompression
SMB: Surface Marker Buoy
SPG: Submersible Pressure Guage
UDM: Underwater Demolition
UDT: Underwater Demolition Team
WOB: Water Oxygen Blender
WOBT: Water Oxygen Bottom Time
YOY: Year of the Year
VGE: Venous Gas Embolism
VPM-B: Varying Permeability Model-B
Again, this is not an exhaustive list and there are many more terms and acronyms used in diving. Some of them can be specific to certain agencies, countries, or regions.
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