NOAA Chart 18526: Port of Portland: Including Vancouver; Multnomah Channel-southern part 26.6 x 47 (WATERPROOF) Printed on high quality waterproof and tear-resistant material by NOAA Chart Agent, Paradise Cay Publications Paradise Cay Publications brand charts are sold exclusively by Ruby & Rudy's Books Always printed on demand using the most recent data from NOAA Prepared to be display quality. Shipped rolled in a cardboard tube.