Air navigation charts V 30 (series). 90. Lat. 45°S-29°S. long. 59°W-91°W. Scale 1″=30 naut. m. (1:2,188,800) at lat. 37°30′, contour interval 1,000, 2,000, 3,000, 5,000, 7,000, 9,000, 12,000, 15,000 and 20,000 ft.