United States. Hydrographic office, U.S. Navy. United States Navy. Hydrographic Office. North Decimal Degree 78.000000. South Decimal Degree 69.0000. East Decimal Degree 100.0000. West Decimal Degree 60.0000. Map no. 1262a. Small corrections Sept. '41, Jan. '42. On lower margin: "New publication: 5th ed. Oct. 1927".