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*** Special Notice Regarding LORAN Closure: *** In accordance with the 2010 DHS Appropriations Act, the U.S. Coast Guard terminated the transmission of all U.S. LORAN-C signals on 08 Feb 2010. This termination does not affect U.S. participation in the Russian American or Canadian LORAN-C chains. U.S. participation in these chains will continue temporarily in accordance with international agreements. You may read more and download pertinent documents via our LORAN-C page.
Nationwide DGPS
Primary Mission Areas:
Maritime Information:
NDGPS EXPANSION PROJECTS


The following information provides the status of ongoing efforts and projects. Efforts continue to prepare additional sites for operation. You may view the status of these sites from our site status page.

  • Eglin, FL: This site was declared operational 12 May 09.
  • Card Sount, FL: This site was declared operational 6 June 09
  • St. Mary's, WV: St. Mary's, WV: This site was declared operational 17 Dec 08.
  • Essex, CA: This site was declared operational 06 Mar 07.
  • Dandridge, TN: This site was declared operational 03 Jul 06.
  • Mequon, WI: This site was declared operational 06 Sep 06.