27 x 48" Oceanic Navigation Chart from updated sources starting in the 1830 Office of Hydrography for the British Admiralty and being used and updated by NOAA or USC &GS Or other American or Foreign Naval sources in duration. Fine detailed condition . Manuscript additions evident in pencil from last use of 1978. This sheet covers From Hong Kong to Liau-Tung along the East Coast of China , from the mouth of the Canton River to the Bay separating China from Korea, past all South China Sea neighbors.