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U.S. Chart No. 1

U.S. Chart No. 1: Symbols, Abbreviations and Terms used on Paper and Electronic Navigational Charts provides descriptions and depictions of three nautical chart symbology sets.

  • "INT1" symbols specified by the International Hydrographic Organization (IHO).

  • U.S. symbols used on nautical charts published by the National Oceanic and Atmospheric Administration (NOAA) and the National Geospatial-Intelligence Agency (NGA), when they differ from INT1 symbols.

  • ECDIS symbols used to display Electronic Navigational Chart (ENC) data on Electronic Chart Display and Information Systems (ECDIS) as specified by the IHO.

Edition 12, dated April 2013, supersedes all previous editions of U.S. Chart No. 1.

Free copies of U.S. Chart No. 1 in PDF format are available below:

Download U.S. Chart No. 1
(6 MB)
Please be patient. This large file may take a few minutes to download.

Viewing PDF files requires use of the Adobe Reader.

The U.S. Government no longer prints paper copies of U.S. Chart No. 1. However, paper copies may be purchased through one of NOAA’s certified U.S. Chart No. 1 Publishing Agents listed below:

OceanGrafix            ProStar Publications            Paradise Cay Publications            Horizon Nautical

Download updates to U.S. Chart No. 1, Edition 12 in PDF format below:

22 Oct 2013

If you have questions or comments about U.S. Chart No. 1, please send them to USChart1@noaa.gov.

Please submit inquiries or comments regarding other NOAA products and services through NOAA's Nautical Inquiry System.

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