Marcus Island LORAN-C transmitter

The LORAN-C transmitter mast Minami Torishima (Japanese南鳥島 ロランC局, Minami- Torishima Roran - shī - kyoku; . Engl Marcus Iceland LORAN -C transmitter ) is a LORAN-C transmitter mast Japanese coastguard on Minami Torishima (Marcus Iceland ). It was originally built and operated by the U.S. Coast Guard. He is used to this day to data in the long-wave frequency range over very long distances to send. By 1993, he was part of the Grid 9970 and 4000 kW one of the most powerful stations worldwide.

History

The U.S. Coast Guard in 1964 presented the first radiating transmitting mast on the island with 411.48 meters completed. He was thus the tallest structure in Japan and sent the 333 -meter high Tokyo Tower clear to second place. The first tower was dismantled in 1985 and replaced by a second, smaller, 213.4 m high mast in the following year. This title took over the Tokyo Tower as the tallest structure in Japan again, until he was surpassed in 2012 by the Tokyo Skytree.

In 1993, the United States handed over the investment of the Japanese Coast Guard. Until this year, the plant was operated at a power of 4000 kW. The second mast was demolished in 2000 and replaced by a more modern, 213 m high mast. The power has been lowered to 1100 kW and part of the LORAN - C transmitter chain GRI 8930th