Air navigation chart V30 (series). 6. Lat. 59°N-75° N, long. 122° E-55* E. Scale 1″ = 30 naut. m. (1: 2.188,800) at lat. 67°30′, contour interval 1,000, 2,000, 3,000, 5,000 and 7,000 ft.