Printed on high quality waterproof and tear-resistant material by NOAA Chart Agent, Paradise Cay PublicationsnParadise Cay Publications brand charts are sold exclusively by Ruby u0026amp; Rudyu0026#39;s BooksnAlways printed on demand using the most recent data from NOAAnPrepared to be display quality. Shipped rolled in a cardboard tube.nPrinted by Paradise Cay Publications using proprietary methods and materials. Certified by NOAA and the U.S. Coast Guard for carriage on commercial vessels. Ruby u0026 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.