Question: Within what New York based munitions storage and disposal facility was the LORAN-C transmitter Seneca located? 
Sentence (from "LORAN-C transmitter Seneca"): The LORAN-C transmitter Seneca was 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).
Relevant evidence: Yes