Charts. Corral Bay, Chile, from Chilean Government chart published in 1918, scale naut. m.=3.5 in., natural scale 1:20,816, with inset, Port Corral; Rio Valdivla, Chile, Corral Bay to Valdivla, from Chilean Government survey in 1868-70 corrected to 1918, scale naut. m.=1.8 In., natural scale 1:40, 464; chart 1564.