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Eng ID Term Definition
1821
firth
A Scottish word: an ARM OF THE SEA; an ESTUARY of a RIVER.
1822
fish aggregating device (FAD)
See FISH HAVEN.
1823
fishery conservation zone
See FISHING ZONE.
1824
fish farm
An assemblage of cages, nets, rafts and floats or posts where fish, including shellfish, are artificially cultivated.
1825
fish haven
Areas established by private interests, usually sport fishermen, to simulate natural reefs and wrecks that attract fish. The reefs are con­s... more
Areas established by private interests, usually sport fishermen, to simulate natural reefs and wrecks that attract fish. The reefs are con­structed by dumping assorted junk in areas which may be of very small extent or may stretch a considerable distance along a depth contour. Fish havens are outlined and labeled on charts. Also called fishery reefs.
1826
fishing area
See FISHING GROUND.
1827
fishing ground
A water area in which fishing is frequently carried on. Also called fishing area or fishing zone.
1828
fishing reef
See FISH HAVEN.
1829
fishing zone
The offshore zone in which exclusive fishing rights and management are held by the coastal nation.
1830
fish lead
See LEAD.
1831
fish (or fishing) stakes
Poles or stakes placed in SHALLOW WATER to outline FISHING GROUNDS or to catch fish.
1832
fish trap (or weir)
A structure for catching fish. See also TUNNY NET.
1833
fish trap buoy
A BUOY marking the limits of a fish trap area.
1834
fish weir
See FISH TRAP.
1835
fix
In NAVIGATION, a relatively accurate POSITION determined without reference to any former POSITION. It may be classed as visual, celestial, e... more
In NAVIGATION, a relatively accurate POSITION determined without reference to any former POSITION. It may be classed as visual, celestial, electronic, etc., depending upon the means of establishing it.
1836
fix
(v.t.). In hydrographic SURVEYING, to determine, at regular intervals, the POSITION of ships or boats, while sailing along a LINE OF SOUNDIN... more
(v.t.). In hydrographic SURVEYING, to determine, at regular intervals, the POSITION of ships or boats, while sailing along a LINE OF SOUNDING. The usual method of fixing HYDROGRAPHIC SURVEYS within sight of LAND is the THREE-POINT FIX METHOD.
1837
fix: circular
A useless FIX resulting from the OBSER­VA­TIONS of two angles es­tablishing as LOCI three coinciding CIRCLES OF POSITION. Also called revolv... more
A useless FIX resulting from the OBSER­VA­TIONS of two angles es­tablishing as LOCI three coinciding CIRCLES OF POSITION. Also called revolver, or swinger.
1838
fix: running
A POSITION determined by crossing LINES OF POSITION obtained at different TIMES and advanced or retired to a common TIME, the expression bei... more
A POSITION determined by crossing LINES OF POSITION obtained at different TIMES and advanced or retired to a common TIME, the expression being applied to a POSITION determined by advancing and retiring a line over a considerable period of time.
1839
fix: split
A FIX obtained by measuring two angles to four objects whose POSITIONS are known, i.e. with no common centre object.
1840
fix: three-point
A FIX obtained by simultaneously observing, with SEXTANTS, the two adjacent angles between three suitably disposed objects whose POSITI­ONS ... more
A FIX obtained by simultaneously observing, with SEXTANTS, the two adjacent angles between three suitably disposed objects whose POSITI­ONS are known, and plotting the POSITION by a STATION POINTER. See also RESECTION and THREE-POINT PROBLEM.