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Notice To Mariners

Maritime Safety Information

The mission of NGA's Maritime Domain is to provide global maritime geospatial intelligence in support of national security objectives including safety of navigation, international obligations, intelligence activities and joint military operations.

US Notice to Mariners

The US Notice to Mariners provides timely marine safety information for the correction of all US Government navigation charts and publications from a wide variety of sources both foreign and domestic. To ensure the safety of life at sea, the information published in the Notice to Mariners is designed to provide for the correction of unclassified nautical charts, the Unclassified NGA/DLIS Catalog of Hydrographic Products, United States Coast Pilots, NGA List of Lights, USCG Light Lists, and other related nautical publications produced by NGA, NOS and the USCG.

The US Notice to Mariners corrects NGA and NOS charts using information collected from many sources, among them the Local Notice to Mariners published by the various US Coast Guard districts. The US Notice to Mariners will contain only those chart corrections of interest to ocean going vessels.

Copies of the US Notice to Mariners dating back to issue 29/1999 are available for viewing and downloading.

 

 Product Search Sites

 
NGA Notice to Mariners
URL: http://msi.nga.mil/NGAPortal/MSI.portal?_nfpb=true&_pageLabel=msi_portal_page_61
The US Notice to Mariners provides timely marine safety information for the correction of all US Government navigation charts and publications from a wide variety of sources both foreign and domestic.
 

 Additional Information and Resources

 
Anti-Shipping Activity Messages
URL: http://msi.nga.mil/NGAPortal/MSI.portal?_nfpb=true&_pageLabel=msi_portal_page_65
Anti-Shipping Activity Messages (ASAM) include the locations and descriptive accounts of specific hostile acts against ships and mariners. The reports may be useful for recognition, prevention and avoidance of potential hostile activity.

Broadcast Warnings
URL: http://msi.nga.mil/NGAPortal/MSI.portal?_nfpb=true&_pageLabel=msi_portal_page_63
In support of the Global Maritime Distress and Safety System (GMDSS), Broadcast Warnings are promulgated by the Worldwide Navigational Warnings Service (WWNWS) to provide rapid dissemination of information critical to navigation and the safety of life at sea.

Mobile Offshore Drilling Units
URL: http://msi.nga.mil/NGAPortal/MSI.portal?_nfpb=true&_pageLabel=msi_portal_page_67
Mobile Offshore Drilling Units, or MODU, are facilities designed or modified to engage in drilling and exploration activities. The term MODU includes drilling vessels, semisubmersibles, submersibles, jack-ups, and similar facilities that can be moved without substantial effort. These facilities may or may not have self-propulsion equipment on board and may require dynamic positioning equipment or mooring systems to maintain their position.