Airways plotting chart VR (series). 56. Lat. 15° S-1° N, long. 128°-103° E. 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, 9,000. 12,000, ft.