Within the would of Scuba Diving you will always come across acronyms, there has already been one in the first half of this sentence, Scuba - Self Contained Underwater Breathing Apparatus. Here are a few more to help you understand what we're talking about........

Agencies

• SDI - Scuba Diving International
• TDI - Technical Diving International
• PADI - Professioanl Association of Dive Instructors
• BSAC - British Sub Aqua Club 
• DAN - Diver's Alert Network
• MCA - Maritime and Coastguard Agency
• RNLI - Royal National Lifeboat Institution
• RYA -Royal Yatching Association
  

Qualifications

• OW - Open Water
• AOW - Advanced Open Water
• RD - Rescue Diver
• DM - Dive Master 
• MSD - Master Scuba Diver
• AI - Assistant Instructor
• OWSI - Open Water Scuba Instructor
• MSDT - Master Scuba Diving Trainer
  
• EFR - Emergency First Repsonse
• CD - Course Director (PADI)
• IT - Instructor Trainer
  

General Terms 

• ABLJ - Adjustable Buoyancy Life Jacket
• BCD - Buoyancy Compensator Device  Buoyancy Control Device
• BWRAF - Buoyancy Weights Releases Air Final OK (PADI)
• CCR - Closed Circuit Rebreather
• CNS - Central Nervous System
  
• CPR - Cardio-Pulmonary Resuscitation
• DCI - Decompression Illness
• DCS - Decompression Sickness
• DPV - Diver Propulsion Vehicle
• EAN - Enriched Air Nitrox
• GPS - Global Positioning System
• LAT - Lowest Astronomical Tide
• NDL - No Decompression Limit
• PFO - Patent Foramen Ovale
• RDP - Recreational Dive Planner
• SAR - Search and Rescue
• SCR - Semi Closed Rebreather
  
• SCUBA - Self Contained Underwater Breathing Apparatus
• SPG - Submersible Pressure Guage
• TP - Test Pressure
• UPTD - Unit Pulmonary Toxic Dose
• WP - Water Pressure, also Working Pressure
• YBOD - Better known as the "Yellow Box Of Desire"refers to APD Rebreathers

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