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This is a U.S. Government system.  Before continuing, read this  disclaimer.
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Commercial Use Warning

Certain hardcopy NGA nautical products, including nautical charts, are no longer available from NGA.[1] The Agency is in the process of transitioning from hardcopy products and information to digital data and information. The websites and are the official US Government sources for NGA digital format nautical products, information and data. The full text of current publications will be maintained on these websites and will be available for all users to download. NGA claims no copyright or other intellectual property right in the nautical products posted on this website for public use.

Conditions for Reproduction, Use or Sale of NGA Nautical Products Downloaded from the NGA Website:

Use of Agency Name, Seal or Initials   In accordance with 10 U.S.C. § 425[2], the use of the National Geospatial-Intelligence Agency (NGA) (or predecessor organizations, National Imagery and Mapping Agency (NIMA) or Defense Mapping Agency (DMA)) name, seal or initials to imply or suggest approval or any commercial endorsement by NGA without written permission from the Secretary of Defense and the Director of National Intelligence is prohibited. All non-Agency published products, information or data which include the NGA, NIMA or DMA name, seal or initials or otherwise express or imply any association with NGA, NIMA or DMA shall contain the following disclaimer:


This reproduction, partial or complete, of any National Geospatial-Intelligence Agency (NGA), National Imagery and Mapping Agency (NIMA) or Defense Mapping Agency (DMA) product, information or data is not approved, authorized or endorsed by the Secretary of Defense, the Director of National Intelligence, the Director, NGA or any other element of the US Government.  The US Government and NGA accept no liability for the accuracy or quality of this reproduction or the use of any NGA, NIMA or DMA products, information or data."

This disclaimer shall be displayed prominently on the cover and first page of any hardcopy publication, on any map or chart, on any media, video cassette, on the shrink wrap of any CD or DVD, on any DVD or CD-ROM, on the jewel case label and any insert in the jewel case.  This disclaimer shall be displayed prominently in the start up or initial screen of any software product or program as well as in the "About" dialog window (usually accessible by the "Help" drop-down menu).  In addition, any installation diskettes, CD-ROMS, or DVDs will contain the disclaimer in a separate text file located in the root directory and named "disclaimer.txt."

NGA will not be liable for the accuracy or quality of any user products, regardless of the amount or complexity of NGA information or data used in their production.[3]  

[1] U.S. Notice to Mariners-Change in Distribution Methods, Fed. Reg. Vol. 69, No. 148 (Aug. 3, 2004).  Summary: The National Geospatial-Intelligence Agency (NGA) is changing the way it makes U.S. Notice to Mariners available to the public.  NGA will continue to publish electronic versions of the U.S. Notice to Mariners and make them available free of charge via the Internet, but will no longer mass-produce and mail copies of each Notice.

[2] 10 U.S.C. § 425.  Prohibition of unauthorized use of name, initials, or seal: specified intelligence agencies Prohibition.  Except with the written permission of both the Secretary of Defense and the Director of Central Intelligence, no person may knowingly use, in connection with any merchandise, retail product, impersonation, solicitation, or commercial activity in a manner reasonably calculated to convey the impression that such use is approved, endorsed, or authorized by the Secretary and the Director, any of the following (or any colorable imitation thereof):

(1) The words "National Imagery and Mapping Agency", the initials "NIMA", or seal of the National Imagery and Mapping Agency.

(2) The words "Defense Mapping Agency", the initials "DMA", or the seal of the Defense Mapping Agency.

(3) The words "National Geospatial-Intelligence Agency", the initials "NGA", or the seal of the National Geospatial-Intelligence Agency.

[3] 10 U.S.C. § 456. Civil actions barred

(a) Claims barred.  No civil action may be brought against the United States on the basis of the content of a navigational aid prepared or disseminated by the National Geospatial-Intelligence Agency.

(b) Navigational aids covered.  Subsection (a) applies with respect to a navigational aid in the form of a map, a chart, or a publication and any other form or medium of product or information in which the National Geospatial-Intelligence Agency prepares or disseminates navigational aids.