LORAN (LOng RAnge Navigation) is a terrestrial
radio navigation system using
low frequency radio transmitters that use the time interval between radio signals received from three or more stations to determine the position of a ship or aircraft. The current version of LORAN in common use is LORAN-C, which operates in the low frequency portion of the EM spectrum from 90 to 110
kHz. Many nations are users of the system, including the
United States,
Japan, and several European countries. Russia uses a nearly identical system in the same frequency range, called
CHAYKA. LORAN use is in steep decline, with
GPS being the primary replacement. However, there are current attempts to enhance and re-popularize LORAN.
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