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NMD-401

Description of the radar set, tactical-technical characteristics

Figure 1: NMD-401

Figure 1: NMD-401

Specifications
frequency: 9 320 … 9 430 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 2 000 Hz
pulsewidth (τ): 0.3 µs
receive time:
dead time:
peak power: 30 kW
average power:
instrumented range: 40 NM (≙ 74 km)
range resolution:
accuracy:
beamwidth: 1.8°
hits per scan:
antenna rotation: 10 min⁻¹
MTBCF:
MTTR:

NMD-401

The NMD-401 was a maritime navigation radar operating in the X-Band In 1952 it was the first marine radar to be developed and built independently in Japan. The prototype was installed on the Hokuto-maru, the navigation training center of the Japanese Ministry of Transport.