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Eng ID Term Definition
3581
omnidirectional range
See OMNIRANGE.
3582
omnirange
A radio AID TO NAVIGATION providing direct indication of the MAGNETIC BEARING (OMNIBEARING) of that STATION from any direction. Also calledo... more
A radio AID TO NAVIGATION providing direct indication of the MAGNETIC BEARING (OMNIBEARING) of that STATION from any direction. Also calledomnidi­rectional rangeor omnidirectional beacon.
3583
one-way traffic lane
See TRAFFIC LANE.
3584
onshore wind
WIND blowing from SEA toward the LAND. See SEA BREEZE.
3585
on soundings
Said of a vessel navigating within the 100-FATHOM LINE. In earlier times, said of a vessel in water sufficiently shallow for sounding by HAN... more
Said of a vessel navigating within the 100-FATHOM LINE. In earlier times, said of a vessel in water sufficiently shallow for sounding by HAND LEAD.
3586
on the beam
Bearing approximately 090° relative (on the starboard beam) or 270° relative (on the port beam). The expression is often used loosely for ... more
Bearing approximately 090° relative (on the starboard beam) or 270° relative (on the port beam). The expression is often used loosely for broad on the beam, or bearing exactly 090° or 270° relative. Also called abeam. See also BROAD ON THE BEAM.
3587
on the bow
Bearing approximately 045° relative (on the starboard bow) or 315° relative (on the port bow). The expression is often used loosely for br... more
Bearing approximately 045° relative (on the starboard bow) or 315° relative (on the port bow). The expression is often used loosely for broad on the bow, or bearing exactly 045° or 315° relative. See also BROAD ON THE BOW.
3588
on the quarter
Bearing approximately 135° relative (on the starboard quarter) or 225° relative (on the port quarter). The expression is often used loosel... more
Bearing approximately 135° relative (on the starboard quarter) or 225° relative (on the port quarter). The expression is often used loosely for broad on the quarter, or bearing exactly 135° or 225° relative. See also BROAD ON THE QUARTER.
3589
ooze
A soft MUD or SLIME. A fine-grained pelagic SEDIMENT containing undis­solved SAND- or silt-sized, calcareous or siliceous skeletal remains ... more
A soft MUD or SLIME. A fine-grained pelagic SEDIMENT containing undis­solved SAND- or silt-sized, calcareous or siliceous skeletal remains of small marine organisms in propor­tion of 30 percent or more, the remainder being amor­phous clay-sized material.
3590
opacity (optical)
The ratio of the incident to the transmitted (or reflected) light. It varies with the use of scattered or specular light.
3591
opalescence
Whitish colour of the ATMOSPHERE and a slight change of the apparent colour of objects with respect to normal (for example, bluish colour of... more
Whitish colour of the ATMOSPHERE and a slight change of the apparent colour of objects with respect to normal (for example, bluish colour of an object normally black or dark) produced by the SCATTE­RING of light by small particles held in suspension in the ATMOSPHERE.
3592
open coast
A COAST that is not sheltered from the SEA.
3593
open end traverse
See TRAVERSE: OPEN.
3594
opening
A break in a COASTLINE or a PASSAGE through a REEF, between SHOALS, etc. Any break in SEA ICE which reveals the water.
3595
open pack ice
FLOES seldom in contact with many LEADS and POOLS. ICE CONCENTRATION 4/10th to 9/10th.
3596
open port
A PORT which is not ICEBOUND during winter.
3597
open roadstead
A ROADSTEAD with relatively little protection from the SEA.
3598
open sea
That part of the OCEAN not enclosed by HEAD­LANDS, within narrow STRAITS, etc. See HIGH SEA.
3599
open sound
A BAY similar to a LAGOON but with large OPENINGS between the protect­ing ISLANDS.
3600
open traverse
See TRAVERSE.