3/22/2019: Special notice to mariners – upcoming GPS week number rollover

The Coast Guard Navigation Center published a special notice to mariners that use GPS Equipment. The special notice outlines the details of the GPS Week Number Rollover that will occur April 6-7, 2019.


2/7/2019: International Ice Patrol resumes operations, daily iceberg warning products for 2019 ice season

The Coast Guard International Ice Patrol announced it has commenced operations for the 2019 ice season as of Feb. 5, 2019 and will resume production of the North American Ice Service daily iceberg warning products from its operations center in New London, Connecticut.


12/4/2018: Long Range Identification and Tracking: Have you reported in the last six hours?

Long Range Identification and Tracking plays an important role in Maritime Domain Awareness. Countries that fall under the purview of the SOLAS convention can share the necessary marine security information along with all other required information about the ships that sail through the countries’ coastal boundaries. In this post, the Navigation Center provides information about reporting requirements.


11/8/2018: U.S. Maritime Advisory 2018-014- GPS Interference in Eastern Mediterranean and Red Seas

Maritime Commons is sharing the content of U.S. Maritime Advisory 2018-014-GPS to inform our readers that significant GPS interference continues to be reported by vessels and aircraft operating in the Eastern Mediterranean Sea near Port Said, Egypt, the Suez Canal, and in the vicinity of the Republic of Cyprus.


9/17/2018: Reports of GPS problems submitted by public now available on Navigation Center’s website

Reports of GPS problems submitted to Navigation Center through the webpage will be posted to the GPS Problem Report Status webpage after review by NAVCEN staff. Reports will be anonymized to protect the submitter’s personal information and any equipment manufacturer data. All reports made in 2018 are now available and prior years will be available in the future.


7/23/2018: 2018 Public Interface Control Working Group and Open Public Forum

The Global Positioning Systems Directorate has announced the 2018 Public Interface Control Working Group and Open Public Forum. The meeting will be held Sept. 12, 2018, at the TASC/Engility facility in El Segundo, California, and will be available through teleconference. The purpose of this meeting is to update the public on GPS public document revisions and collect issues/comments for analysis and possible integration into future GPS public document revisions.


7/3/2018: Is your Automated Identification System ready for Subchapter M?

During the month of June 2018, over 50 percent of towing vessels operating in U.S. waters transmitted incorrect AIS data, and an alarming number of these vessels did not accurately report their dimensions or broadcast a properly assigned MMSI number. This post provides guidance to owners/operators for verifying compliancy with AIS requirements as they work to attain a COI under Subchapter M.


6/20/2018: GPS satellite maintenance

GPS users should be aware that there may be a short period of high Horizontal Dilution of Precision (HDOP) / Position Dilution of Precision (PDOP) in two locations June 22-23, 2018.


5/31/2018: Navigation Center visits European counterparts to discuss global satellite system information sharing

The EU is building Galileo, a Global Navigation Satellite System similar to the U.S. GPS, and their GSC has looked at NAVCEN as a model service center for civil GNSS. The bilateral talks are allowing and encouraging full cooperation between the two service centers and NAVCEN is sharing its 30 years of experience in representing civil users in the U.S. GPS program. The two service centers discussed their roles and respective responsibilities to support civil users of GPS and Galileo, along with how they can continue to improve the sharing of relevant navigation information.


5/7/2018: U.S. Maritime Advisory 2018-007 – GPS Interference in Eastern Mediterranean Sea

Maritime Commons is sharing the content of U.S. Maritime Advisory 2018-007 to notify our readers that multiple instances of significant GPS interference have been reported by vessels and aircraft operating in the Eastern Mediterranean Sea since March 18, 2018.


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