SF Surface Search Radar

Photograph of SF radar console

U.S. Navy. Via


Wavelength 10 cm
Pulse Width 1 microsecond
Pulse Repetition Frequency     
400 Hz
Scan rate
15 rpm
Power 80 kW
Range 12 nautical miles (22 km) on battleship
8 nautical miles (15 km) on destroyer
24" paraboloid antenna mounted in a radome
5" A scope
5" PPI
Accuracy 75 to 200 yards/2 degrees
70 to 180 meters/2 degrees
Resolution 150 yards (140 meters)
Production: In preproduction at start of war. 1655 sets built from 1943-3 to 1944-8.

SF was a small ship surface search radar, used primarily in frigates and corvettes. Early models were unusually buggy and field testing did not begin until June 1942, but the final production set was highly reliable, with a mean time to failure of 375 hours.

Fifty sets were delivered to the British as Lend-Lease and a number of others were installed in Free French ships in American ports.


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