Radio navigation, the application of radio frequencies to determining a position
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Born in Samara, Russia, Alford invented and developed antennas for radio navigation systems, now used for VHF omnidirectional range and instrument landing systems.
LORAN, a terrestrial radio navigation system originally known as LRN for Loomis Radio Navigation
In Rantum there is an emitter of the LORAN {formerly operated by the US COAST GUARD} radio navigation system, using a 193 metre tall lattice tower mast radiator as an antenna.
In addition as Inertial Navigation and Global Positioning System technologies did not yet exist, and aircraft were out of range of normal radio navigation beacons during transoceanic flights, an accurate GMT time source was essential for use with specialist sextants for astronavigation (obtaining geographical position by relative angles of the horizon, the sun and other stars).