ASMI (Airport Surface Movement Indicating Radar) used at Heathrow airport


Decca ASMI (Airport Surface Movement Indicating Radar) used at Heathrow from 1967-1989. The object was used to give air-traffic controllers a high-definition picture of the entire airfield. The object was situated on top of the control tower. By giving controllers a pin-point picture of the airfield, including even individual aircraft and vehicles, the airfield could operate in darkness and fog.

The high resolution resulted from the very short wavelength used- 8mm.


Radar & Radio Location
Object Number:
National Air Traffic Services

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