Scale 1:39,000,000 at Equator ; Mercator projection (W 180⁰--E 180⁰/N 84⁰--S 70⁰).
"Compiled jointly by the United States Naval Oceanographic Office and the United Kingdom's British Geological Survey." Ancillary maps of Arctic and Antarctica regions on verso. Polar stereographic proj. Scale 1:2,500,000 at 71⁰.