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Eng ID Term Definition
541
box compass
See DECLINA­TOIRE.
542
box gauge
See GAUGE: FLOAT.
543
box sextant
A small portable instrument used for approximate measurement of angles.
544
brackish water
Water in which salinity values range from approximately 0.50 to 17.00 parts per thousand.
545
brash ice
Accumulation of FLOATING ICE made up of small fragments not more than 2 metres across; the wreckage of other forms of ICE.
546
breaker
A WAVE breaking on the SHORE, over a REEF, etc. Breakers may be roughly classified into three kinds, although the categories may overlap: sp... more
A WAVE breaking on the SHORE, over a REEF, etc. Breakers may be roughly classified into three kinds, although the categories may overlap: spilling breakers break gradually over a considerable distance; plunging breakers tend to curl over and break with a crash; and surging breakers peak up, but then instead of spilling or plunging they surge up on the beach face. The French word 'brisant' is also used for the obsta­cle causing the breaking of the WAVE.
547
breaking of waves
Disintegration of a WAVE which breaks with foam in SHALLOWS whose gradient is more or less regular. An incomplete breaking can likewise resu... more
Disintegration of a WAVE which breaks with foam in SHALLOWS whose gradient is more or less regular. An incomplete breaking can likewise result from a sudden reduction in DEPTH.
548
breakwater
A structure protecting a shore area, HARBOUR, ANCHORAGE, or BASIN from WAVES. See also FLOATING BREAKWATER.
549
breeze
A WIND of moderate strength. See LAND and SEA (or LAKE) BREEZE.
550
bridge
1. An elevated structure extending across or over the weather deck of a vessel, or part of such a structure. The term is sometimes modified ... more
1. An elevated structure extending across or over the weather deck of a vessel, or part of such a structure. The term is sometimes modified to indicate the intended use, such as navigating bridge or signal bridge. 2. A structure erected over a depression or an obstacle such as a body of water, railroad, etc., to provide a roadway for vehicles or pedestrians.
551
bridge: bascule
A counterpoise bridge rotated in a vertical plane about an axis at one or both ends. Also called balance bridge.
552
bridge: draw
A general name for bridges of which part or the entire span of the bridge may be raised or drawn aside to allow ships to pass through.
553
bridge: lift
A movable bridge which is capable of being lifted vertically to allow vessels to pass beneath.
554
bridge: swing
A movable bridge which rotates in a horizontal plane about a vertical pivot to allow the passage of vessels.
555
bridge clearance
See CLEARANCE.
556
bridging
See STEREOTRIANGULATION.
557
broad on the beam
Bearing 090° relative (broad on the starboard beam) or 270° relative (broad on the port beam). If the bearings are approximate, the expressi... more
Bearing 090° relative (broad on the starboard beam) or 270° relative (broad on the port beam). If the bearings are approximate, the expression on the beam or abeam should be used. See also ON THE BEAM.
558
broad on the bow
Bearing 045° relative (broad on the starboard bow) or 315° relative (broad on the port bow). If the bearings are approximate, the expression... more
Bearing 045° relative (broad on the starboard bow) or 315° relative (broad on the port bow). If the bearings are approximate, the expression on the bow should be used. See also ON THE BOW.
559
broad on the quarter
Bearing 135° relative (broad on the starboard quarter) or 225° relative (broad on the port quarter). If the bearings are approximate, the ex... more
Bearing 135° relative (broad on the starboard quarter) or 225° relative (broad on the port quarter). If the bearings are approximate, the expression on the quarter should be used. See also ON THE QUARTER.
560
broadcast
Communication by RADIO intended for reception at any point within a specified area.