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Glossary - I

IANTD International Association of Nitrox and Technical Divers
IDEST Inspectorate for Diving Equipment Servicing and Testing.
Immersion Diuresis When immersed a person will cool down causing
constriction of the blood vessels, the blood flow will be sent to the main organs, away from the legs and the body will sense an increase in
fluids and send a signal to get rid of some fluid, causing the diver to urinate.
Inboard An engine that is fitted inside a boat.
Inert Gases Those gases present in a breathing mixture which are not metabolised.
Intercardinal Compass points (NE, SE, SW, NW) lying midway between the cardinal points.
ISO International Standards Organisation.
Isogonic line A line of constant magnetic variation.










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