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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