GL III (c) Radar No 4 MK1 ZPI CDN
The No. 4 MK 1 Zone Position Indicator (ZPI) was a radar used to give an early warning of enemy aircraft to the Canadian GL III radar system. It provided approximate range and bearing of incoming targets to the APF (Accurate Position Finder) No. 3 MK 1, exhibited to the left. The ZPI would track […]
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