Air navigation chart, V30 (series). 11. Lat. 44° N-60° N, long. 79° W-121° W. Seale 1 in. = 30 naut. m. (1:2,188.-800). contour interval 1.000. 2.000. 3.000. 5.000. 7.000. 9.000 and 12.000 ft.