The Maritime Safety Office collects, evaluates and compiles worldwide marine navigation products and databases. It is responsible for maritime safety and hydrographic activities including support to the worldwide portfolio of NGA and National Oceanic and Atmospheric Administration standard nautical charts and hardcopy and digital publications.
Publications are available in digital format and include the U.S. Notice to Mariners, Sailing Directions, NGA List of Lights, US Coast Guard Light Lists, American Practical Navigator (Bowditch) and other navigation science publications. The office coordinates the worldwide Navigational Warning Service's NAVAREA IV and NAVAREA XII safety messages, an essential part of the Global Maritime Distress and Safety System.
Electronic access to databases and products is provided at https://msi.nga.mil. The site includes U.S. Notice to Mariners and other selected publications in PDF format, a marine navigation calculator and corrections to NGA, NOS and U.S. Coast Guard hydrographic products. To find more information or to submit updated information for navigation publications or charts, e-mail MarHelp@nga.mil, or write to:
National Geospatial-Intelligence Agency
Maritime Safety Office
Mail Stop N64 SH
7500 GEOINT Drive
Springfield, VA 22150-7500