Editing Loran-C (section)

===Loran-C in the 21st century===
Although Loran-C was largely redundant by 2000, it has not universally disappeared {{as of|2014|lc=y}} due to a number of concerns. One is that the GPS system can be jammed through a variety of means. Although the same is true of Loran-C, the transmitters are close-at-hand and can be adjusted if necessary. More importantly, there are effects that might cause the GPS system to become unusable over wide areas, notably [[space weather]] events and potential [[Electromagnetic pulse|EMP]] events. Loran, located entirely under the atmosphere, offers more resilience to these issues. There has been considerable debate about the relative merits of keeping the Loran-C system operational as a result of such considerations.

In November 2009, the [[United States Coast Guard]] announced that Loran-C was not needed by the U.S. for maritime navigation. This decision left the fate of LORAN and eLoran in the United States to the Secretary of the [[United States Department of Homeland Security|Department of Homeland Security]].<ref name="dhs">{{Cite web|url=http://www.gpsworld.com/gnss-system/LORAN-letter-secretary-napolitano-9124|archive-url=https://web.archive.org/web/20091212021228/http://www.gpsworld.com/gnss-system/LORAN-letter-secretary-napolitano-9124|url-status=dead|title=Senate committee letter|archive-date=12 December 2009}}</ref> Per a subsequent announcement, the US Coast Guard, in accordance with the DHS Appropriations Act, terminated the transmission of all U.S. Loran-C signals on 8 February 2010.<ref name="USCG LORAN">{{Cite web|url=http://www.navcen.uscg.gov/?pageName=loranMain|title=LORAN-C General Information|access-date=4 August 2010|publisher=[[United States Coast Guard]]}}</ref> On 1 August 2010 the U.S. transmission of the Russian American signal was terminated,<ref name="USCG LORAN" /> and on 3 August 2010 all Canadian signals were shut down by the USCG and the CCG.<ref name="USCG LORAN" /><ref name=can>{{Cite web |url=http://www.notmar.gc.ca/go.php?doc=eng/services/notmar/Loran-C-eng |title=Termination of the Loran-C Service |work=notmar.gc.ca |access-date=4 August 2010 |archive-date=20 November 2013 |archive-url=https://web.archive.org/web/20131120060811/http://www.notmar.gc.ca/go.php?doc=eng/services/notmar/Loran-C-eng |url-status=dead }} (for access click on "I have read..." and "Accept")</ref>

The [[European Union]] had decided that the potential security advantages of Loran are worthy not only of keeping the system operational, but upgrading it and adding new stations.{{cn|date=February 2025}} This is part of the wider [[Eurofix]] system which combines GPS, [[Galileo (satellite navigation)|Galileo]] and nine Loran stations into a single integrated system.

In 2014, Norway and France both announced that all of their remaining transmitters, which make up a significant part of the Eurofix system, would be shut down on 31 December 2015.<ref>http://kartverket.no/efs-documents/editions/2015/efs01-2015.pdf, page 26</ref> The two remaining transmitters in Europe ([[Anthorn Radio Station|Anthorn]], UK and [[LORAN-C transmitter Rantum|Sylt]], Germany) would no longer be able to sustain a positioning and navigation Loran service, with the result that the UK announced its trial eLoran service would be discontinued from the same date.<ref>{{cite web|url=https://www.trinityhouse.co.uk/notice-to-mariners/27-15-enhanced-loran-discontinued|title=27-15 Enhanced Loran discontinued|publisher=[[Trinity House]]|series=[[Notice to Mariners]]|date=1 December 2015}}</ref>