Knowledge Base
bandwidth
The frequency range within which the product will be able to accurately measure signals. Specified in Hz.

batten down
Secure hatches and loose objects both within the hull and on deck.

beam
The greatest width of the boat.

bearing
The horizontal direction of one terrestrial point from another, expressed as the angular distance from a reference direction, usually measured from 000&qdeg; at the reference direction clockwise through 359°

Beaufort wind scale
A numerical scale for indicating wind speed. Beaufort numbers (or forces) range from force 0 (calm) to force 12 (hurricane).

below
Beneath the deck.

bias stability
The maximum expected drift in a sensor’s output. This can be measured as a function of time or as a function of temperature.

bight
The part of the rope or line, between the end and the standing part, on which a knot is formed.

bilge
The interior of the hull below the floor boards.

bitter end
The last part of a rope or chain. The inboard end of the anchor rode.

blink
I Loran-C, a signal used to indicate that a station is malfunctioning. Intended to prevent the use of that signal for navigation.

boat
A fairly indefinite term. A waterborne vehicle smaller than a ship. One definition is a small craft carried aboard a ship.

boat hook
A short shaft with a fitting at one end shaped to facilitate use in putting a line over a piling, recovering an object dropped overboard, or in pushing or fending off.

boot top
A painted line that indicates the designed waterline.

bow
The forward part of a boat.

bow line
A docking line leading from the bow.

bowline
A knot used to form a temporary loop in the end of a line.

bridge
The location from which a vessel is steered and its speed controlled. "Control Station" is really a more appropriate term for small craft.

bridle
A line or wire secured at both ends in order to distribute a strain between two points.

brightwork
Varnished woodwork and/or polished metal.

bulkhead
A vertical partition separating compartments.

buoy
An anchored float used for marking a position on the water or a hazard or a shoal and for mooring.

burdened vessel
That vessel which, according to the applicable Navigation Rules, must give way to the privileged vessel. The term has been superseded by the term "give-way".

 
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