Charts. Corral Bay, Chile, from Chilean Government chart published in 1918, corrected to 1933, scale naut. m.=3.5 in., natural scale 1:20,816, with inset, Port Corral; Rio Valdivia, Chile, Corral Bay to Valdivia, from Chilean Government survey in 1868-70, corrected to 1933, scale naut. m.=1.8 in., natural scale 1:40,464; chart 1564.