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Type 978

Description of the radar set, tactical-technical characteristics

Figure 1: Antenna ATZ of Type 978 radar

Figure 1: Antenna ATZ of Type 978 radar

Specifications
frequency: 9 410 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1 000 or 2 000 Hz
pulsewidth (τ): 1 µs or 0.2 µs
receive time:
dead time:
peak power:
average power:
instrumented range: 40 NM (≙ 74 km)
range resolution: < 46 m
accuracy: 2%
beamwidth:
hits per scan:
antenna rotation: 20 or 24 min⁻¹
MTBCF:
MTTR:

Type 978

Type 978 was operating in X-Band surface warning and navigation radar for British destroyers and frigates. This radar replaced the earlier Type 277Q. Later it was also replaced by Type 1006.

The antenna ATZ is a 6 feet wide double-cheese, the upper for transmission, the lower for reception. The speed of rotation depends on the feed with either 50 or 60 Hz mains voltage.