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Fig. 12.2 Indicator, controls and antenna of “Liman” shipboard radar
Technical and navigation characteristics.
The maximum target detection range on the indicator screen in conditions of
standard atmospheric refraction, in the absence of precipitations, with an antenna
installation height of 15 m, with a probability of 0.8—not less:
15 nautical miles—shores 60 m high;
7 nautical miles—6 m high coast;
11 nautical miles—ships of 5000 gross tonnage;
3 nautical miles—ships of 20 gross tonnage;
2.5 nautical miles—medium sea buoy (without corner radar reflector).
The minimum detection range with a probability of 0.8 of an average sea buoy
(without a corner radar reflector) or a corner radar reflector with an effective scattering
surface of 10,000 m
2 , installed at a height of 2.5 m, with an antenna installation height
of 15 m, is no more than 20 nautical miles.
Typical antenna installation height above the waterline is 15 m. Increasing the
antenna installation height compared to the typical one, increases the maximum and
minimum detection ranges and vice versa.
The circular scan rate of airspace (antenna rotation) is 24 + l/−3 rpm. The station
has the modes of image orientation in the north, in course or in course, stabilized
at the presence of interfacing with the gyrocompass (GC) and can display the radar
image on the indicator screen in relative and true motion modes.