Doppler radar cannot be used in helicopters. A. True B. False

doppler-radar-cannot-be-used-in-helicopters-a-true-b-false

Doppler radar cannot be used in helicopters.

A. True

B. False

I had been asked this question in an internship interview.

This question is from Doppler Radar topic in section Celestial Navigation, Doppler and Altimeter Radars of Avionics

Right choice is B. False

The explanation: Helicopters fly at a very slow speed where the conventional pitot tube system may fail. In order to measure accurate airspeed below 40 knots, other systems such as the Doppler radar is used. It is suitable for three dimensional velocity and low velocity measurement, as required for helicopter navigation.