The LORAN-C transmitter Seneca is the master station of the Northeast US LORAN-C

LORAN

LORAN is a terrestrial radio navigation system using low frequency radio transmitters in multiple deployment to determine the location and speed of the receiver....

 Chain (GRI 9960) and the X-Ray secondary
station of the Great Lakes Chain (GRI 8970). It is located within the Seneca Army Depot

Seneca Army Depot

The former Seneca Army Depot occupied 10,587 acres between Seneca Lake and Cayuga Lake in Seneca County, New York. It was used as a munitions storage and disposal facility by the United States Army from 1941 until the 1990s. The Depot was listed in the 1995 Base Realignment and Closure Commission...

 in Romulus, New York

Romulus, New York

Romulus is a town in Seneca County, New York, United States. The population was 2,036 at the 2000 census. The town is named after the mythical founder of Rome, Romulus, a name assigned by a clerk with an interest in the classics...

, South of Geneva, New York

Geneva, New York

Geneva is a city in Ontario and Seneca counties in the U.S. state of New York. The population was 13,617 at the 2000 census. Some claim it is named after the city and canton of Geneva in Switzerland. Others believe the name came from confusion over the letters in the word "Seneca" written in cursive...

. It uses a 1000 Kilowatt; 700 foot (213.36 m) guyed mast

Guyed mast

A guyed mast is a tall thin vertical structure that receives support from guy lines.Guyed masts are frequently used for radio masts. The mast can either support aerials mounted at its top, or the entire structure itself can function as an antenna ; this is called a mast radiator...

 that was constructed in 1977 and dedicated on August 2, 1978. The station is operated by United States Coast Guard

United States Coast Guard

The United States Coast Guard is a branch of the United States Armed Forces and one of the seven U.S. uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the military branches for having a maritime law enforcement mission and a federal regulatory agency...

 and is located on a 250 acres (1 km²) piece of land within the 10,587 acre facility. The transmitter is used to guide ships and aircraft up to 1000 miles (1,609.3 km) away. It was the first LORAN station to use solid state

Solid state (electronics)

Solid-state electronics are those circuits or devices built entirely from solid materials and in which the electrons, or other charge carriers, are confined entirely within the solid material...

 versus vacuum tube

Vacuum tube

In electronics, a vacuum tube, electron tube , or thermionic valve , reduced to simply "tube" or "valve" in everyday parlance, is a device that relies on the flow of electric current through a vacuum...

components.