Knowledge Base
hard chine
An abrupt intersection between the hull side and the hull bottom of a boat so constructed.

hatch
An opening in a boat’s deck fitted with a watertight cover.

HDOP
Horizontal Dilution of Precision. Similar to GDOP, except elevation factors are ignored.

head
A marine toilet. Also the upper corner of a triangular sail.

heading
The horizontal direction in which a ship actually points or heads at any instant, expressed in angular units from a reference direction, usually from 000° at the reference direction clockwise through 359°. (see True Heading and Magnetic Heading).

heading-to-steer
The difference between the bearing to destination (from present position) and track-made-good, applied to the bearing to the destination.

headway
The forward motion of a boat. Opposite of sternway.

helm
The wheel or tiller controlling the rudder.

helmsperson
The person who steers the boat.

hitch
A knot used to secure a rope to another object or to another rope, or to form a loop or a noose in a rope.

hold
A compartment below deck in a large vessel, used solely for carrying cargo.

horizontal dilution of precision
(HDOP) Similar to GDOP, except elevation factors are ignored.

hull
The main body of a vessel.

 
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