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- Create Date March 4, 2020
- Last Updated December 20, 2020
U.S. Chart No. 1
U.S. Chart No. 1, Nautical Chart Symbols, Abbreviations and Terms, presents the symbols depicted on paper nautical charts produced by the National Geospatial-Intelligence Agency (NGA) and the National Oceanic and Atmospheric Administration (NOAA), on raster representations of these paper charts such as Raster Nautical Charts (RNC®), and on Electronic Navigational Charts (ENC).
The publication also presents the symbols described in the "Regulations of the IHO for International (INT) Charts" and "Chart Specifications of the IHO", published by the International Hydrographic Organization, and now includes a section providing important details about Electronic Chart Display and Information Systems (ECDIS).