U.S. Chart No. 1 describes the symbols, abbreviations, and terms used on nautical charts. It is produced by NOAA and the National Geospatial-Intelligence Agency. The symbols for paper charts and their analogous digital products, such as NOAA raster navigational charts (NOAA RNC®) are shown, as well as the symbols used to portray NOAA electronic navigational charts (NOAA ENC®) data on Electronic Chart Display and Information Systems (ECDIS).