Question

Which of the following type of direction finder has a system that rotates the loop, using a servo system until a null is found?

(a) Fixed loop

(b) Rotatable loop

(c) Rotating loop

(d) Fixed, crossed loop

I got this question in an interview for internship.

The above asked question is from Point Source Radio Systems in chapter Terrestrial Radio Navigation System of Avionics

Answer 1

The correct choice is (c) Rotating loop

Best explanation: The rotating loop is driven by a motor and forming part of a servo system that rotates the loop until a null is found and then stops. They are sometimes referred to as the radio compass and are housed inside plastic structures that do not reflect radio waves.