| (1) World-wide radio navigation network (2) A very low-frequency navigation system (3) High accuracy, very-low frequency (VLF) long-range navigation system of the hyperbolic type, covering the entire earth down to the surface from eight ground-based transmitters. used principally by airliners, military aircraft and intercontinental business aircraft (3) A navigation system that uses two high-powered transmitter ground stations to broadcast a continuous wave signal. The receiver measures the range difference between the two stations to determine position.
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