27 x 40" Oceanic Navigation Chart from updated sources starting in the 1956 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
the area north of The US , Canada boundary along the west coast, Vancouver island northern 2/3 and the entrance to Charlotte bay
