The LORAN-C transmitter Seneca is the master station of the Northeast US LORAN-C Chain (GRI 9960) and the X-Ray secondary station of the Great Lakes Chain (GRI 8970). It is located within the Seneca Army Depot in Romulus, New York, South of Geneva, New York. It uses a 1000 Kilowatt; 700 foot (213.36 m) guyed mast that was constructed in 1977 and dedicated on August 2, 1978. [1] The station is operated by United States Coast Guard and is located on a 250-acre (1.0 km2) piece of land within the 10,587 acre facility. [2] The transmitter is 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 versus vacuum tube components. [3]