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	Eng ID	Term	Definition
	1841	fixed angle plot	(British terminology). Plot prepared in advance for use in normal SOUNDING in lieu of a STATION POINTER. The arcs of equal angle subtended b... more (British terminology). Plot prepared in advance for use in normal SOUNDING in lieu of a STATION POINTER. The arcs of equal angle subtended by selected MARKS are drawn on the SOUNDING BOARD at convenient intervals depending on the SCALE. The observed sextant angles can then be plotted in the field by visual inspection. See also CIRCLE SHEET, and SOUNDING: FIXED ANGLE.
	1842	fixed angle sounding	See SOUNDING.
	1843	fixed platform	See FIXED STATION.
	1844	fixed star	A STAR. The expression is used particularly to distinguish STARS from other HEAVENLY BODIES; so called by ancients to distinguish STAR... more A STAR. The expression is used particularly to distinguish STARS from other HEAVENLY BODIES; so called by ancients to distinguish STARS from the wandering PLANETS.
	1845	fixed station	A radiolocation station which is situated in one particular spot throughout the period of its operation. As opposed to MOBILE STATION. A... more A radiolocation station which is situated in one particular spot throughout the period of its operation. As opposed to MOBILE STATION. Also called shore station.In OCEANOGRAPHY, a platform from which repeated OBSERVATIONS are taken. These include coastal and island stations, LIGHT VESSELS, WEATHER SHIPS, AUTOMATIC FLOATING STATIONS and ICE ISLANDS. Also called fixed platform.
	1846	fixing	The process of rendering a developed photographic image permanent by removing the unaffected light-sensitive material.
	1847	fixing interval	The time or distance elapsed between two subsequent fixes.
	1848	fjord	See FIORD.
	1849	flare stack	A tall structure used for burning-off waste oil or gas.
	1850	flare triangulation	See TRIANGULATION.
	1851	flat	A level tract of LAND, as the BED of a dry LAKE or an area frequently uncovered at LOW TIDE. Usually in plural.
	1852	flat-bed plotter	A plotter which uses a flat surface to mount the drawing base.
	1853	flattening of the earth	The ratio of the difference between the equatorial and polar radii of the EARTH (major and minor semi-axes of the SPHEROID) and its equatori... more The ratio of the difference between the equatorial and polar radii of the EARTH (major and minor semi-axes of the SPHEROID) and its equatorial radius (major semi-axis). The flattening of the earth is the ellipticity of the spheroid. Also called compression.
	1854	flight altitude	See ALTITUDE.
	1855	flight strip	A succession of overlapping AERIAL PHOTOGRAPHS taken along a single COURSE.
	1856	Flinders bar	A bar of soft unmagnetized iron placed vertically near a MAGNETIC COMPASS to counteract DEVIATION caused by MAGNETIC INDUCTION in vertical S... more A bar of soft unmagnetized iron placed vertically near a MAGNETIC COMPASS to counteract DEVIATION caused by MAGNETIC INDUCTION in vertical SOFT IRON of the craft.
	1857	float	Any buoyant object attached to nets or fishing lines: term also used for the small buoys used for current observations.
	1858	float gauge	See GAUGE.
	1859	floating breakwater	A contrivance consisting of a series of square frames of timber connected by mooring chains or CABLES attached to anchors or stone blocks in... more A contrivance consisting of a series of square frames of timber connected by mooring chains or CABLES attached to anchors or stone blocks in such a manner as to form a BASIN within which vessels riding to anchor may be protected from the violence of the WAVES.
	1860	floating dock	See DOCK.
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