The public comment period ends on May 22. Submit your comment now!

Public comment is requested regarding implementation of eLoran in the a Federal Register notice posted  on March 22, 2015.


"The purpose of this notice is to seek comment from the public and industry regarding potential plans by the United States Government to implement an enhanced Long Range Navigation (eLoran) system as a complementary positioning, navigation, and timing (PNT) capability to the Global Positioning System (GPS). The positioning, navigation, and timing performance of eLoran will vary widely depending on the number of transmitters and monitor sites for corrections that are implemented.”

Maintenance of safety and security are central requirements for an alternative system designed to provide positioning, navigation and timing (PNT) services if satellite-based services are unavailable for any reason. Would the eLoran system would maintain PNT capabilities for you in the absence of GPS to warrant equipage? Would the economic impact of a GPS outage be reduced by eLoran for you? 

 For an easy link to submit your comment, visit
The Resilient Navigation and Timing Foundation

...and encourage Congressional representatives early and often!

Please share the links with friends and colleagues. Many thanks for your help,

Robert Lilley, Ph. D., Former Secretary
International Loran Association


The International Loran Association has ceased active operations. This site will remain as an archive for researchers and students, at this address or another host site, to be announced.

The Association thanks its members and friends for their loyalty, interest and support through the years, and encourages you to remain active, using such organizations as the Royal Institute of Navigation and the Institute of Navigation.

On February 7, 2008, the United States Department of Homeland Security (DHS) announced that eLoran is adopted as the national backup system to GPS for position, navigation, and timing.
Click here for the Press Release

That announcement was not followed by action to deploy eLoran in the U.S.

Since the 2008 release, the ILA has been encouraging the DHS to follow up the promise of deployment and operation of eLoran as a GPS alternative nav system. Our cause  was joined by the  Resilient Navigation and Timing Foundation, and others.

Meanwhile, e-Loran continues to be of interest, and is in operation on other parts of the world.

Learn about eLoran
The Enhanced Loran (eLoran) Definition Document was developed in 2006 at the United States Coast Guard Navigation Center by an international team of authors and was published by the ILA in 2007. Click here for the Enhanced Loran (eloran) Definition Document.


If you are interested in reading papers about Loran, viewing recent presentations by our members, or researching the ILA Archives, please visit our Library