GLOSSARY OF TERMS
15-3
GIVE-WAY BOAT – (1) Term for the boat that must take whatever action necessary to keep well clear of the boat with the right-of-
way in meeting or crossing situations. (2) The burdened boat.
GUNWALE – The rail or upper edge of a boat’s side.
HEAD – A marine toilet.
HELM – The steering wheel or command area.
HULL – The body of the boat.
HYPOTHERMIA – A physical condition where the body loses heat faster than it can produce it.
IN-LINE FUSE – A type of protective fuse located in the power wire of a direct current (DC) circuit usually near the battery.
KEEL – The lowest portion of the boat; extends fore and aft along the boat’s bottom.
LIST – Leaning or tilt of a boat toward the side.
MAKING WAY – Making progress through the water.
MARINE CHART – Seagoing maps showing depths, buoys, navigation aids, etc.
MOORING – An anchor, chain, or similar device that holds a boat in one location.
NAVIGATION AID – Recognizable objects on land or sea such as buoys, towers or lights which are used to fix position to identify
safe and unsafe waters.
NMMA – National Marine Manufacturer’s Association
NO-WAKE SPEED – The speed at which a boat travels to produce an imperceptible wake.
PFD – Personal flotation device.
PITOT TUBE – See SPEEDOMETER PICKUP TUBE.
PLANING HULL – A hull designed to lift, thereby reducing friction and increasing efficiency.
PORPOISE – A condition in which the bow bounces up and down caused by trimming the engine too far out.
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