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Type 293

Description of the radar set, tactical-technical characteristics

Figure 1: Type 293
© 2004 Jörg Waterstraat, (www.kriegsschiffe.eu)

Figure 1: Type 293Q (2004, DD "Caesar" Klasse)
© 2004 Jörg Waterstraat, (www.kriegsschiffe.eu)

Specifications
frequency: S-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF): 500 Hz
pulsewidth (τ): 0.7 and 1.9 µs
receive time:
dead time:
peak power: 500 kW
average power:
instrumented range: 25 NM (≙ 46 km)
range resolution: 110 or 300 m
accuracy:
beamwidth:
hits per scan:
antenna rotation: 5, 10 or 15 min-1
MTBCF:
MTTR:

Type 293

The Type 293 is an operating in S-Band surveillance and target designation radar. The radar is equipped with a so called “cheese antenna” forming a fan-beam antenna pattern. It acquired that name because it looked like a block of cheese cut in half.

The Type 293 radar system first saw service in 1944 with a 6 foot antenna (6 ft × 4 in ≙ 4° × 35°). The rotation rate was 15 rpm and the pulse length 1.5 µs at a PRF of 500 Hz. Type 293M, which incorporated an 8 foot antenna (8 ft × 7.5 in ≙ 3° × 30°). It was introduced into service in 1945 and provided a maximum range of 15 NM (≙ 28 km). Type 293P was similar to the previous model but it was modified for easier maintenance. A post-war radar program introduced in early 1960s the Type 293Q set with a redesigned 12 foot antenna (12 ft × 7.5 in ≙ 2° × 30°).[1] In the Swedish Royal Navy this radar got the designator P-234.

Sources and ressorces:

  1. F.A. Kingsley: ''The Applications of Radar and Other Electronic Systems in the Royal Navy in World War 2'' Springer, 2016, ISBN 9781349136230 p. 26 (online preview)