West coast of Pemba Island, including ports Kiuyu, George, and Cockburn, and Chaki-Chaki Bay, Africa, east coast, from British survey in 1878, scale naut. m.= 1.5 in.; with inset, Msuka Bay, north coast of Pemba Island, from British survey in 1878, scale naut. m.=.05 in.; chart 2504.