Air navigation chart V30 (series). 80. Lat.30° S-14° S, long. 28° E-0° Scale 1″ = 30 naut. m. (1:2,188,800) at lat. 22° 30′, contour interval 1,000, 2,000, 3,000, 5,000, 7,000 and 9,000 ft.