Nautical charts. Hood Canal. Hood Canal. Port Ludlow to South Point, Wash., topography by Coast and Geodetic Survey in 1927, supplement by surveys by U.S. Engineers in 1936, hydrography by Coast and Geodetic Survey in 1927, supplemented by surveys to 1945; no. 6421. Scale naut. m=3.6 in., scale 1:20,000.