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.nSmall Format Charts are proportionately scaled down in size to 21 inches on the smallest dimension. These are not printed to full size, therefore the scale is not the same as the full size NOAA chart, however the scale bars on the charts are proportionally reduced in size, and can be used for reference. These charts are not recommended for navigation. Printed by Paradise Cay Publications using proprietary methods and materials. 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.