Loran-C is a hyperbolic radio navigation system that allows a receiver to determine its position by listening to low frequency radio signals that are transmitted by fixed land-based radio beacons. Loran-C combined two different techniques to provide a signal that was both long-range and highly accurate, features that had been incompatible. Its disadvantage was the expense of the equipment needed to interpret the signals, which meant that Loran-C was used primarily by militaries after it was introduced in 1957.
Radio navigation or radionavigation is the application of radio frequencies to determine a position of an object on the Earth, either the vessel or an obstruction. Like radiolocation, it is a type of radiodetermination.
OMEGA was the first global-range radio navigation system, operated by the United States in cooperation with six partner nations. It was a hyperbolic navigation system, enabling ships and aircraft to determine their position by receiving very low frequency (VLF) radio signals in the range 10 to 14 kHz, transmitted by a global network of eight fixed terrestrial radio beacons, using a navigation receiver unit. It became operational around 1971 and was shut down in 1997 in favour of the Global Positioning System.
CHFM-FM is a Canadian radio station broadcasting at 95.9 FM in Calgary, Alberta. Owned by Rogers Sports & Media, the station broadcasts an adult contemporary format. CHFM's studios are located on 7th Avenue Southwest in Downtown Calgary, while its transmitter is located on Patina Hill Drive Southwest in West Calgary.
The LORAN-C transmitter Jan Mayen was a LORAN-C transmission facility on the island of Jan Mayen at 70°54′51″N8°43′57″W. The LORAN-C transmitter Jan Mayen used as an antenna had a 190-metre tall (625 ft) guyed mast.
Jan Mayensfield is an aerodrome serving Olonkinbyen in Jan Mayen, Norway. Operated by the Norwegian Armed Forces, it serves the island's only population at the combined military and meteorological station. It has a 1,500-meter (4,921 ft) dirt runway numbered 06–24.
Iwo Jima LORAN-C transmitter was a LORAN-C transmitter at Iwo Jima, Japan of Grid 9970 at 24°48′8″N141°19′32″E. The Iwo Jima LORAN-C transmitter had a transmission power of 4 megawatts, which is more than the most powerful broadcasting stations. The Iwo Jima LORAN-C transmitter had a 411.5 meter (1350 ft) tall guyed mast, which was built in 1963. A guy wire insulator eyebolt failed sending the insulator crashing into the tower, knocking it out of plumb. It collapsed in 1964 on repair of the structural damage caused by the insulator. The collapsing tower killed four construction contract workers, three on the tower and one on the ground. The collapse also destroyed the transmitter building.
Marcus Island LORAN-C transmitter, or Minami Torishima LORAN-C transmitter, is a former LORAN-C transmitter on Minami-Tori-shima in Ogasawara, Tokyo, Japan at. Until 1993 it was part of Grid 9970 and used a transmission power of 4000 kilowatts, which was more than the most powerful broadcasting stations ever used.
Bø LORAN-C transmitter is a LORAN-C transmitter at Bø, Norway. Bø LORAN-C transmitter is the X-ray secondary station of the Ejde chain and the master station of the Bø chain. The transmission power of Bø LORAN-C transmitter is 400 kW.
LORAN-C transmitter Carolina Beach was the Zulu secondary station of the U.S. Southeast chain of LORAN-C. The transmitter power was 800 kW. The free-standing antenna of 190.5 metres (625 ft) height was situated near Carolina Beach, North Carolina. After the shutdown of Loran-C in the U.S. in 2010, the transmitter and tower radiator were removed.
LORAN-C transmitter Ejde was the Master station of the Ejde LORAN-C Chain. It used a transmission power of 400 kW. Ejde LORAN-C transmitter, situated near Eiði at. Ejde LORAN-C transmitter used as antenna a 190.5 metre tall mast radiator. In 1962 the mast of LORAN-C transmitter Ejde collapsed as a result of a slipping guy rope. The mast has been demolished.
LORAN-C transmitter Malone was the master station of the Southeast U.S. LORAN-C Chain and the Whiskey Secondary of the Great Lakes chain. It used a transmission power of 800 kW for both chains.
LORAN-C transmitter Fallon was the Master station of the U.S. West Coast LORAN-C Chain. It used a transmission power of 400 kW.
LORAN-C transmitter Grangeville was the Whiskey secondary station of the Southeast U.S. LORAN-C Chain. It used a transmission power of 800 kW.
The LORAN-C transmitter Seneca was the master station of the Northeastern United States LORAN-C Chain and the X-Ray secondary station of the Great Lakes Chain. It was located within the Seneca Army Depot in Romulus, New York, south of Geneva. It used a 1000-kilowatt, 742-foot guyed mast that was constructed in 1977 and dedicated on August 2, 1978. The station was operated by United States Coast Guard and was located on a 250-acre (1.0 km2) piece of land within the 10,587-acre (42.84 km2) facility. The transmitter was used to guide ships and aircraft up to 1,000 miles (1,600 km) away. It was the first LORAN station to use solid-state electronics versus vacuum tube components.
LORAN-C transmitter Saint Paul was the master station of the North Pacific LORAN-C Chain. It used a transmission power of 325 kW. Saint Paul LORAN-C transmitter, situated at Saint Paul, Alaska at. Saint Paul LORAN-C transmitter used as antenna a 190.5 meter tall mast radiator. The mast has been demolished.
LORAN-C transmitter Helong is the Yankee secondary of the China North Sea Loran-C Chain. It uses a transmission power of 1200 kW. LORAN-C transmitter Helong is situated near Helong at.
LORAN-C transmitter Kargaburun is the Yankee secondary station of the Mediterranean Sea LORAN-C Chain . It uses a transmission power of 165 kW. Kargaburun LORAN-C transmitter is situated at Kargaburun in Marmara Ereğlisi district of Tekirdağ Province, Turkey at 40°58'21" N, 27°52'2" E,.
LORAN, short for long range navigation, was a hyperbolic radio navigation system developed in the United States during World War II. It was similar to the UK's Gee system but operated at lower frequencies in order to provide an improved range up to 1,500 miles (2,400 km) with an accuracy of tens of miles. It was first used for ship convoys crossing the Atlantic Ocean, and then by long-range patrol aircraft, but found its main use on the ships and aircraft operating in the Pacific theater during World War II.