Printed by Paradise Cay Publications using proprietary methods and materials. Certified by NOAA and the U.S. Coast Guard for carriage on commercial vessels. Ruby & Rudy's Books are the exclusive seller of this brand of nautical charts. Other sellers using this listing are not authorized to sell this brand of chart and are likely offering an inferior product. NOAA-CERTIFIED AGENT: NOAA provides digital images to its NOAA CERTIFIED CHART AGENTS who have had to go through a vigorous vetting process which includes submitting samples of charts to NOAA. After careful evaluation NOAA deems the prospective agent’s chart offering to be acceptable in scale and print quality. The chart samples also have to withstand a reasonable amount of erasing so that the charts can be used for plotting, and the paper these charts are approved to be reasonably water resistant to meet NOAA’s standards. Only a chart printed by a certified NOAA Chart Agent are authorized to carry the NOAA logo and are authorized to satisfy carriage requirements. Paradise Cay Publications charts – sold exclusively but Ruby & Rudy’s are certified NOAA charts. Please see our complete line of chart products including, PAPER CHARTS, WATERPROOF CHARTS, SMALL FORMAT CHARTS, BOOKLETCHARTS and BOOK CHARTS.