3-69K6 C
What is the main underlying operating principle of the Very-high-frequency Omnidirectional Range (VOR) aircraft navigational system?
A. A definite amount of time is required to send and receive a radio signal.
B. The difference between the peak values of two DC voltages may be used to determine an aircraft's altitude above a selected VOR station.
C. A phase difference between two AC voltages may be used to determine an aircraft's azimuth position in relation to a selected VOR station.
D. A phase difference between two AC voltages may be used to determine an aircraft's distance from a selected VOR station.
