The Pacific War Online Encyclopedia
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The Type A Detector System was a very primitive form of radio
detection that was nonetheless widely deployed in the inner Japanese Empire. It consisted of
separate transmitter and receiver antennas many miles apart, with
the transmitter sending a continuous wave signal. Aircraft flying
between the transmitter and receiver created an interference
pattern on the receiver scope, but there was no information on
precise bearing, altitude, or number of aircraft. It was thus
nothing more than an electronic tripwire that could be laid across
possible aircraft approach routes.
The antennas were typically placed up to 100 miles (160 km)
apart, but one pair covered the 400 miles (640 km) between Shanghai and Formosa.
References
Price (2005)The Pacific War Online Encyclopedia © 2016 by Kent G. Budge. Index
