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Dive Adventures Scuba Glossary is for scuba divers and anyone else interested in scuba diving terminology. To find the scuba glossary term that you are looking for click on the letters below to display the scuba glossary terms that begin with that letter. If you feel that we have missed a term from our scuba glossary or would like a term added to our scuba glossary please contact us so that we can add that term to our scuba glossary. Dive Adventures thanks you for visiting our scuba glossary and helping us to make it better for other scuba divers and those interested in scuba diving terminology Optionally you may select "All Terms" to display the entire list of terms from our scuba glossary database. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All Terms

N Narcosis Depressed mental state, anywhere from confusion or drowsiness to coma. NAUI National Associatio of Underwater Instructors. It is one of the oldest certifying agencies. Nautical Mile Also known as a "geographical mile" or "sea mile"; a unit of distance designed to equal approximately 1 minute of arc of latitude, 6080.20 ft.; approximately 1.15 times as long as the statute mile of 5280 ft. Nitrogen Inert gas that makes up 79% of air. Nitrogen is inert in that it does not enter into any chemical reation in the body, but it can cause problems under pressure (see nitrogen narcosis, decompression sickness). Nitrogen Narcosis Depressed mental state from high nitrogen pressure; usually does not begin to manifest on compressed air until below 80 fsw. Nitrox Any mixture of nitrogen and oxygen that contains less than the 79% nitrogen as found in ordinary air. NOAA Abbreviation for the National Oceanic and Atmospheric Association.

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Modified 04/22/2008