What is Free Flow?

What is a Knot?

What is Ingassing?

What is Working Pressure?

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What is Off-Gassing?

What is Open Circuit Scuba?

What is a Decompression Stop in Scuba Diving?

What is a Lifeline?

What is Sidemount Diving?

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What is Supplied Air Snorkeling for Youth (SASY)?

What is a Dive Operator?

What is the purpose of Fins in Scuba Diving, Freediving, and Snorkeling?

What is a Jon Line?

What is Heliox?

What function does Helium have in Scuba Diving?

What is the Association of SCUBA Service Engineers and Technicians?

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What is Equalization when Scuba Diving?

What is a A-Clamp Valve?

What is a Dive Light?

What is a Decompression Algorithm?

What is a Dry Bag?

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What is Bottom Time when Scuba Diving?

What is a Reverse Profile?

What is a Triangular Dive Profile?

What is Visibility?

What is Outgassing?

What is Professional Diving?

What is Arterial Gas Embolism (AGE)?

What is a cavern in the context of diving?

What is Solo Diving?

What is Activated Carbon in Scuba Diving?

What is a A-Frame?

Why do you need to be aware of the Tide when Diving?

What is Confined Water Diving?

What is Active Addition for Semi-Closed Circuit Rebreathers?

What is a Dry Snorkel?

What is a Liveaboard?

What is a Dropoff?

What is Beach Diving?

What is a Purge Valve?

What is Cave Diving?

What is an Inflator Valve?

What is Acetal Resin?

What is Samba in Scuba Diving?

What is a Helicopter Turn when Scuba Diving, Freediving or Snorkeling?

What is Narcosis?

What is an Alternative Air Source?

What is Overweighting?

What is a No Decompression Dive?

What is Intermediate Pressure?

What is the Maximum Operating Depth?

What is Decompression Sickness (DCS)?

What is Pounds Per Square Inch (PSI)?

What is Partial Pressure?

What is a Jellyfish?

What is Enriched Air Nitrox (EAN)?

What is a Drop Weight?

What is Lift Capacity when Scuba Diving?

What is Scuba Diving?

What is the Frenzel Maneuver?

What is a Yoke Valve?

What is High Pressure Nervous Syndrome (HPNS)?

What is Technical Diving?

What is a Dedicated Dive Resort?