Shown below are points of interest regarding navigation, navigation safety, or other Navigation Center missions. The links will stay on this page for approximately ninety days and then will be removed. The documents they linked to will be archived. You may search our site, including the archives, by keyword, to find the document, publication, or other note of interest for which you may be looking.

• The U.S. Federal Communications Commission (FCC) has issued several documents detailing recent stepped up jamming enforcement actions targeting online U.S. retailers of illegal radio frequency jamming devices. Read more on the GPS.gov website...
• The Air Force started testing the new L2C and L5 GPS signals on June 15th. All test data will be posted on our GPS CNAV Testing page. You may also access the testing page from our GPS section or from the link under "Current Operational / Safety Information" on our home page.
• The Air Force has released updated documents for the Navigation User interface, L5 and L1C, and Interface Specification IS-GPS-200. You may view these documents, dated 5 Sep 2012 on our GPS References page.
• OMAHA, NEBRASKA DIFFERENTIAL GPS (DGPS) BEACON TERMINATION: The Omaha DGPS beacon (298 KHz, Site ID 868) will be terminated at 1500Z (1000CDT) May 15, 2013. For further inquiries, please contact the Navigation Information Service (NIS) via our Contact Us page or via phone at 703-313-5900.
• The Air Force requests public comments on its plan to conduct "live sky" testing of the CNAV message for the GPS L2C and L5 civil signals in June 2013. Please read the Federal Register Notice for more information. Also, you may view the test plan. Note: The comment period has been extended from April 29th to May 5th, 2013.
• The U.S. Committee on the Marine Transportation System (CMTS) is conducting a national online dialog on e-Navigation through 28 February 2013. Your participation is welcomed; please download the CMTS flyer for more information regarding this dialogue.
  
• The Titanic Centennial Commemoration Events schedule has been published and you can view it in PDF. Also visit our comprehensive International Ice Patrol section for much more information on the Coast Guard's Ice Patrol mission.
• On March 14, 2012, the International Hydrographic Organization published a safety notice about the reliable operations of the Electronic Chart Display and Information System (ECDIS). This notice is available for downloading and viewing (PDF).
  
• The U.S. Coast Guard advises that effective 2359 UTC 31 March 2012 it will terminate On Call Ship/Shore HF Radiotelex (SITOR) services currently being provided by its Guam Mariana Islands Communications Station (NRV)...see the entire notice.
  
• GPS users are advised that the GPS satellite constellation status that is broadcast on NIST Radio Stations WWV and WWVH will be discontinued at 2359 Zulu, 30 Nov 2011. Constellation information may be obtained via our website or by calling our status hotline at 703-313-5907. For additional information on Radio Station WWV & WWVH broadcasts visit the NIST website. If you have questions, please contact us.
  
• During the 25th anniversary of forming of CGSIC, the 51st meeting of the Civil GPS Service Interface Committee was held Sept 19-20, 2011 at the Portland, Oregon Convention Center in conjunction with the ION GNSS 2011 meeting. All of the presentations are available for viewing.
• The 50th Space Wing's 2nd Space Operations Squadron installed a major software release containing 104 fixesto the GPS Ground Segment.  Read more...
  
• Please see the U.S. Coast Guard's Marine Safety Alert, "Mariner's Safety Endangered" regarding instances in which VHF distress alerts by Digital Selective Calling lack location and identification information. Read more...
  
• The 50th Space Wing’s 2nd Space Operations Squadron accepted command and control of the second Global Positioning System Block IIF satellite on August 19th.  Read the press release in its entirety.
  
• The CGSIC U.S. States and Local Government Subcommittee (USSLS) will conduct a regional meeting August 24th, 2011 at the Caltrans TransLab Facility, 5900 Folsom Blvd., Sacramento, California. For more information, please see our CGSIC Meetings page.
  
• The Vicksburg DGPS Site is permanently off--line. DGPS users in the Vicksburg area should utilize DGPS signal broadcasts originating from English Turn, La (293 KHz) or Bobo, Ms (297 KHz).
• The Air Force 50th Space Wing successfully completed a two phase Global Positioning System constellation expansion known as "Expandable 24". ...read the Media Release NO. 1106-001 dated June 15, 2011.
  
• All U.S. vessels and mariners are advised that Israel is currently enforcing a blockade in the "Gaza Maritime Area." The area is closed to all maritime traffic and the blockade is being enforced by the Israeli Navy...see the entire Special Notice.
  
• The FAA has issued two flight advisories stating that GPS may be unreliable or unavailable from May 16 - 27, 2011 (0700Z - 1300Z) due to LightSquared testing of a mobile broadband service in Las Vegas, NV and Boulder City, NV. Please refer to FAA NOTAMs LSQ-LAS and LSQ-BVU for more information. (Clicking on the links above will open a new browser window in FAAsafety.gov.)
• The International Hydrographical Organization (IHO) is soliciting participation from chart users to ascertain mariner preferences for uncertainty (quality) indicators on nautical charts. Mariners are encouraged to take this survey to assist the IHO in improving charting products.
• The 2010 Federal Radionavigation Plan, signed the Secretaries of Defense, Homeland Security, and Transportation is now available. Download it here...
  
• At 10:00 a.m. on Thursday, April 14th 2011, the 50th Space Wing accepted two Global Positioning System ground system upgrades during a ceremony held at SCHRIEVER AIR FORCE BASE in Colorado. Read the Media Release...
• Please read two FCC Enforcement Advisories regarding cell jammers, GPS jammers, and other jamming devices.  The notices are for potential sellers / marketers, as well as users of such devices.  The notices have been combined into one pdf document for your ease of download and reading.
  
• Do you use NIST radio station WWV or WWVH? Do you have a radio-controlled clock or set your computer clock using NIST? Do you get NIST time via telephone or Internet? Please take a moment to complete the NIST Time and Frequency Services survey. Your input will be greatly appreciated and used to allocate resources.
  
• The U.S. Coast Guard strongly advises against all operation of and travel by U.S. yachts and sailing craft, or by U.S. citizens on foreign registered yachts and sailing craft, on the Gulf of Aden, Arabian Sea, Somali Basin and the western parts of the Indian Ocean. For more information, please read our Special Notice.
  
• The 2011 Light Lists are now available for download, except for the 8th District Gulf Volume 4 edition, which will be available for download on February 23rd. These Light Lists are updated to LNM (01-2011). The electronic version of the Light Lists are updated monthly by the first Friday of each month.
• The United States Air Force has released ICD-GPS-870, Navstar Next Generation GPS Operational Control Segment (OCX), to User Support Community Interfaces for public comment and review.  Read more...
  
• The Mobile Point DGPS Site will be decommissioned March 15, 2011 at 1600Z and taken permanently off-line.  Read more...
  
• The 50th Space Wing announced the completion of phase one of a two phase GPS constellation expansion known as "Expandable 24." When fully complete, this expansion will increase global GPS coverage and provide civil, military and commercial GPS users with more robust satellite availability and a higher probability of signal acquisition in terrain challenged environments. Read more...
  
• The Eighth and Ninth Coast Guard District reporting requirements for barges loaded with certain dangerous cargoes (CDCs) were suspended on January 15th, 2011.
• Reporting requirements for barges loaded with certain dangerous cargoes (CDCs) have been suspended. You may read more from the Federal Register notice for the Eighth Coast Guard District.
  
• Air Force to Upgrade GPS Operational Control Segment with new software release. Read more...
• The 50th meeting of the Civil GPS Service Interface Committee (USSLS/CGSIC) was conducted September 20-21st. You may download the presentations.
• Mariners are advised that over the course of the next several weeks, the Air Force will conduct an integration assessment of the current GPS Software Baseline. You may read the alert in its entirety...
  
• USCG cautions Mid-Atlantic (VA, MD, DE, PA, NJ, NY) AIS users that they may be operating on improper channels. Read the Safety Alert here...
• Online registration is now closed for the 50th meeting of the Civil GPS Service Interface Committee (USSLS/CGSIC), to be held Sept 20-21, 2010 at the Portland, Oregon, Convention Center in conjunction with the ION GNSS 2010 meeting. You may still register in person at the meeting. Read more...
• You may view the Joint Statement on cooperation and release of the recently-concluded documents for the combined use of GPS & Galileo and WAAS & EGNOS.
• The GPS Systems Wing announced the public release of On Orbit Testing of the first GPS Block IIF Satellite. Read the announcement for details and watch this site for release of the test schedule.
• The 50th meeting of the Civil GPS Service Interface Committee (USSLS/CGSIC) will be conducted September 20-21, 2010 at the Portland, Oregon, Convention Center in conjunction with the ION GNSS 2010 meeting. Read more...
• Coast Guard encourages prudent use of AIS messaging. Please review USCG Safety Alert 05-10 and our AIS Frequently Asked Questions.
• The USCG seeks comment on its proposed rulemaking that significantly changes existing AIS regulations (33 CFR 164.46) and expands carriage to most commercial vessels operating on U.S. navigable waters.
• NOAA's National Ocean Service (NOS) intends to eliminate LORAN-C lattices from future editions of NOS Paper Nautical Charts and Raster Navigational Charts starting in 2009. NOAAs Office of Coast Survey (OCS) requests that all comments about this change be sent via OCS's inquiry page before April 24, 2009. Any other questions may be directed to the inquiry page or by calling NOAA's navigation inquiry hotline: 1-888-990-NOAA (6622).
• LRIT Implementation/Conformance Testing - Operators of U.S. flagged vessels subject to the LRIT Regulation are encouraged to contact the USCG to discuss LRIT implementation and conformance test scheduling. Read more...
• On December 16th, 2008 the Coast Guard published a proposed rule to amend the current AIS regulations, existing AIS regulations(33 CFR 164.46)...
• The Final Programmatic Environmental Impact Statement on the future of the LORAN-C has been published. The appendices are also available for download from our LORAN-C reference section.
• **HIGH HDOP ADVISORY** Users in certain parts of the world may experience short periods of high HDOP/PDOP on September 11th, 2009. Read more...
• **NOTICE OF SITE CLOSURE** The Miami, FL DGPS site, broadcast frequency 322 kHz, will be decommissioned and taken permanently off-line September 8, 2009 at 1200 EST.
• The 2009 Light Lists have been published and are now available for download from our website...read more.
• The Final Programmatic Environmental Impact Statement on the future of the LORAN-C has been published. The appendices are also available for download from our LORAN-C reference section.
• Please be advised that our mailing address has changed and is now: U.S. Coast Guard Navigation Center, NAVCEN MS 7310, 7323 Telegraph Road, Alexandria, VA 20598 - 7310. Mail sent to our previous address will not be delivered. Please contact us with concerns or questions. Our physical location remains the same.
• GPS Users may experience a temporary degradation in GPS receiver reception approximately near Hawaii, USA, and Chile on 22 Oct 2009. Read more...
• GPS Users may experience a temporary degradation in GPS receiver reception approximately near Hawaii, USA, and Chile on 22 Oct 2009. Read more...
• The 49th CGSIC Meeting presentations are now available and may be downloaded from the summary report.
• GPS Wing will hold a teleconference today regarding options for activation of GPS satellite IIR-20M, SVN-49 (PRN-1). See the Federal Register Notice or the the announcement for phone number to participate.
• *** 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. You may read more and download pertinent documents via our LORAN-C page.
• Please be advised of a situational advisory notification for potential for GPS degradation on Friday, 21 May 2010 due to satellite maintenance of PRN'S 16 and 32. You may read the advisory and a detailed report...
• NASA recently released a short paper describing use of the Navigator space-qualified GPS receiver being developed by a team led by Dr. Carl Adams at the NASA Goddard Space Flight Center (GSFC). See the paper....
• GPS Users in certain parts of the world may experience short periods of high HDOP/PDOP. See report.
• A federal Register notice has been released concerning options for activation of GPS satellite IIR-20M, SVN-49 (PRN-1). Please read the announcement here.
• Please be advised of an Important GPS ground control segment software upload (5 March 2010) and our request for immediate user impact notification (ref: NANU 2010041)...read more.
• The 2010 Light Lists have been published and are now available for download from our website...read more.