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Press Office
U.S. Department of Homeland Security
February 7, 2008
Contact: (202) 282-8010 STATEMENT FROM DHS PRESS SECRETARY LAURA KEEHHNER ON THE ADOPTION OF NATIONAL BACKUP SYSTEM TO GPS Today the U.S. Department of Homeland Security will begin implementing an independent national positioning, navigation and timing system that complements the Global Positioning
System (GPS) in the event of an outage or disruption in service.
The enhanced Loran, or eLoran, system will be a land-based, independent system and will mitigate any safety, security,
or economic effects of a GPS outage or disruption. GPS is a satellite-based system widely used for positioning, navigation, and timing. The eLoran system will be an enhanced and modernized version of Loran-C, long
used by mariners and aviators and originally developed for civil marine use in coastal areas.
In addition to providing backup coverage, the signal strength and penetration capability of
eLoran will provide support to first responders and other operators in environments that GPS cannot support, such as under heavy foliage, in some underground areas, and in dense high-rise structures. The system will use
modernized transmitting stations and an upgraded network.
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