The National Oceanic and Atmospheric Administration (NOAA) issued an updated version of Chart No. 1. The chart provides descriptions and depictions of the basic nautical chart elements and symbols used on nautical charts issued by NOAA and the National Geospatial- Intelligence Agency (NGA). (12/8/11). <http://www.nauticalcharts.noaa.gov/mcd/chart1/ChartNo1.pdf>