The Pacific War Online Encyclopedia
Photograph of SG radar antenna
National Archives #19-N-40832.
Cropped by author.
The SG was a vast improvement over SC
radar when it was first introduced in 1942. It was standard on cruisers
and destroyers
by early 1943. Early models did not have the full 50kW power,
but
all models had a 9" (23 cm) PPI display with 15,000 and 75,000 yard
(13,700 and 69,000 meter) range scales as well as a 5" (13 cm) "A"
scan.
The radar was initially buggy and sensitive to shock, and the set on Honolulu at the Battle of Tassafaronga seems to have performed poorly. However, later sets proved sturdy, compact, and dependable. It was well-suited
for
navigation, being capable of easily distinguishing ships from islands.
Starting in 1944, the radar was equipped with antijamming features.
References
Friedman
(1981)
Guerlac (1987)
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