Feet Meters TABLE 13 Geographic Range Height of eye of observer in feet and meters 10 13 680 Object Height TABLE 13 Geographic Range 16 20 23 26 30 Object Height 33 36 10 11 Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles Feet Object Height Feet Meters Height of eye of observer in feet and meters 39 Meters 43 46 49 52 56 59 62 Object Height 66 69 12 13 14 15 16 17 18 19 20 21 Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles Feet Meters 10 13 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 72 79 85 92 98 115 131 148 164 180 197 213 230 246 10 11 12 13 14 15 16 17 18 19 20 22 24 26 28 30 35 40 45 50 55 60 65 70 75 3.1 5.1 6.2 6.8 7.3 7.8 8.3 8.7 9.1 9.5 9.8 10.1 10.4 10.8 11.0 11.3 11.5 11.9 12.1 12.3 12.6 13.0 13.5 13.9 14.3 14.7 15.6 16.5 17.3 18.1 18.8 19.5 20.2 20.8 21.4 3.7 5.7 6.8 7.4 7.9 8.4 8.9 9.3 9.7 10.1 10.4 10.7 11.0 11.4 11.6 11.9 12.1 12.5 12.7 12.9 13.2 13.6 14.1 14.5 14.9 15.3 16.2 17.1 17.9 18.7 19.4 20.1 20.8 21.4 22.1 4.2 6.2 7.3 7.9 8.4 8.9 9.5 9.8 10.2 10.6 10.9 11.2 11.5 11.9 12.2 12.4 12.7 13.0 13.2 13.4 13.7 14.1 14.6 15.0 15.4 15.8 16.8 17.6 18.5 19.2 19.9 20.6 21.3 22.0 22.6 4.7 6.7 7.8 8.4 8.9 9.4 9.9 10.3 10.6 11.1 11.4 11.7 12.0 12.4 12.6 12.9 13.1 13.4 13.7 13.9 14.2 14.6 15.1 15.5 15.9 16.3 17.2 18.1 18.9 19.7 20.4 21.1 21.8 22.4 23.0 5.2 7.3 8.3 8.9 9.5 9.9 10.5 10.8 11.2 11.6 12.0 12.3 12.5 12.9 13.2 13.4 13.7 14.0 14.2 14.4 14.7 15.2 15.6 16.0 16.5 16.8 17.8 18.6 19.5 20.2 20.9 21.7 22.3 23.0 23.6 5.6 7.6 8.7 9.3 9.8 10.3 10.8 11.2 11.6 12.0 12.3 12.6 12.9 13.3 13.5 13.8 14.0 14.4 14.6 14.8 15.1 15.5 16.0 16.4 16.8 17.2 18.2 19.0 19.8 20.6 21.3 22.0 22.7 23.4 24.0 6.0 8.0 9.1 9.7 10.2 10.6 11.2 11.6 11.9 12.4 12.7 13.0 13.3 13.6 13.9 14.2 14.4 14.7 15.0 15.2 15.5 15.9 16.4 16.8 17.2 17.5 18.5 19.4 20.2 20.9 21.7 22.4 23.0 23.7 24.3 6.4 8.4 9.5 10.1 10.6 11.1 11.6 12.0 12.4 12.8 13.1 13.4 13.7 14.1 14.3 14.6 14.8 15.2 15.4 15.6 15.9 16.3 16.8 17.2 17.6 18.0 19.0 19.8 20.6 21.4 22.1 22.8 23.5 24.2 24.8 6.7 8.7 9.8 10.4 10.9 11.4 12.0 12.3 12.7 13.1 13.4 13.7 14.0 14.4 14.7 14.9 15.2 15.5 15.7 15.9 16.2 16.6 17.1 17.5 17.9 18.3 19.3 20.1 21.0 21.7 22.4 23.1 23.8 24.5 25.1 7.0 9.0 10.1 10.7 11.2 11.7 12.3 12.6 13.0 13.4 13.7 14.0 14.3 14.7 15.0 15.2 15.5 15.8 16.0 16.2 16.5 16.9 17.4 17.8 18.2 18.6 19.6 20.4 21.3 22.0 22.7 23.4 24.1 24.8 25.4 10 11 12 13 14 15 16 17 18 19 20 22 24 26 28 30 35 40 45 50 55 60 65 70 75 10 13 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 72 79 85 92 98 115 131 148 164 180 197 213 230 246 10 13 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 72 79 85 92 98 115 131 148 164 180 197 213 230 246 10 11 12 13 14 15 16 17 18 19 20 22 24 26 28 30 35 40 45 50 55 60 65 70 75 7.3 9.3 10.4 11.0 11.5 12.0 12.5 12.9 13.3 13.7 14.0 14.3 14.6 15.0 15.2 15.5 15.7 16.1 16.3 16.5 16.8 17.2 17.7 18.1 18.5 18.9 19.9 20.7 21.5 22.3 23.0 23.7 24.4 25.1 25.7 7.7 9.7 10.8 11.4 11.9 12.4 12.9 13.3 13.6 14.1 14.4 14.7 15.0 15.3 15.6 15.9 16.1 16.4 16.7 16.9 17.2 17.6 18.1 18.5 18.9 19.3 20.2 21.1 21.9 22.7 23.4 24.1 24.7 25.4 26.0 7.9 10.0 11.0 11.6 12.2 12.6 13.2 13.5 13.9 14.3 14.7 15.0 15.2 15.6 15.9 16.1 16.4 16.7 16.9 17.1 17.4 17.9 18.3 18.7 19.2 19.5 20.5 21.3 22.2 22.9 23.6 24.4 25.0 25.7 26.3 8.2 10.2 11.3 11.9 12.4 12.9 13.4 13.8 14.2 14.6 14.9 15.2 15.5 15.9 16.1 16.4 16.6 16.9 17.2 17.4 17.7 18.1 18.6 19.0 19.4 19.8 20.7 21.6 22.4 23.2 23.9 24.6 25.3 25.9 26.5 8.4 10.5 11.5 12.1 12.7 13.1 13.7 14.0 14.4 14.8 15.2 15.5 15.7 16.1 16.4 16.6 16.9 17.2 17.4 17.6 17.9 18.4 18.8 19.2 19.7 20.0 21.0 21.8 22.7 23.4 24.1 24.9 25.5 26.2 26.8 8.8 10.8 11.9 12.5 13.0 13.4 14.0 14.4 14.7 15.2 15.5 15.8 16.1 16.4 16.7 16.9 17.2 17.5 17.7 18.0 18.3 18.7 19.2 19.5 20.0 20.3 21.3 22.1 23.0 23.7 24.5 25.2 25.8 26.5 27.1 9.0 11.0 12.1 12.7 13.2 13.7 14.2 14.6 15.0 15.4 15.7 16.0 16.3 16.7 16.9 17.2 17.4 17.7 18.0 18.2 18.5 18.9 19.4 19.8 20.2 20.6 21.5 22.4 23.2 24.0 24.7 25.4 26.1 26.7 27.3 9.2 11.2 12.3 12.9 13.4 13.9 14.4 14.8 15.2 15.6 15.9 16.2 16.5 16.9 17.1 17.4 17.6 18.0 18.2 18.4 18.7 19.1 19.6 20.0 20.4 20.8 21.8 22.6 23.4 24.2 24.9 25.6 26.3 27.0 27.6 9.5 11.5 12.6 13.2 13.7 14.2 14.7 15.1 15.5 15.9 16.2 16.5 16.8 17.2 17.4 17.7 17.9 18.3 18.5 18.7 19.0 19.4 19.9 20.3 20.7 21.1 22.1 22.9 23.7 24.5 25.2 25.9 26.6 27.2 27.9 9.7 11.7 12.8 13.4 13.9 14.4 15.0 15.3 15.7 16.1 16.4 16.7 17.0 17.4 17.7 17.9 18.2 18.5 18.7 18.9 19.2 19.6 20.1 20.5 20.9 21.3 22.3 23.1 24.0 24.7 25.4 26.1 26.8 27.5 28.1 10 11 12 13 14 15 16 17 18 19 20 22 24 26 28 30 35 40 45 50 55 60 65 70 75 10 13 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 72 79 85 92 98 115 131 148 164 180 197 213 230 246 262 279 295 312 328 361 394 427 459 492 80 85 90 95 100 110 120 130 140 150 22.0 22.6 23.2 23.8 24.3 25.3 26.3 27.3 28.2 29.0 22.6 23.2 23.8 24.4 24.9 25.9 26.9 27.9 28.8 29.7 23.2 23.8 24.3 24.9 25.4 26.4 27.4 28.4 29.3 30.2 23.6 24.2 24.8 25.3 25.9 26.9 27.9 28.9 29.7 30.6 24.2 24.8 25.3 25.9 26.4 27.5 28.5 29.4 30.3 31.2 24.5 25.2 25.7 26.3 26.8 27.8 28.8 29.8 30.7 31.6 24.9 25.5 26.1 26.6 27.2 28.2 29.2 30.1 31.0 31.9 25.3 26.0 26.5 27.1 27.6 28.6 29.6 30.6 31.5 32.4 25.7 26.3 26.8 27.4 27.9 29.0 29.9 30.9 31.8 32.7 26.0 26.6 27.1 27.7 28.2 29.3 30.2 31.2 32.1 33.0 80 85 90 95 100 110 120 130 140 150 262 279 295 312 328 361 394 427 459 492 262 279 295 312 328 361 394 427 459 492 80 85 90 95 100 26.2 26.8 27.4 28.0 28.5 26.6 27.2 27.8 28.3 28.9 26.9 27.5 28.0 28.6 29.1 27.1 27.7 28.3 28.9 29.4 27.4 28.0 28.5 29.1 29.6 27.7 28.3 28.9 29.4 29.9 27.9 28.5 29.1 29.7 30.2 28.2 28.8 29.3 29.9 30.4 28.4 29.0 29.6 30.2 30.7 28.7 29.3 29.8 30.4 30.9 80 85 90 95 100 110 120 130 140 150 29.5 30.5 31.5 32.4 33.3 29.9 30.9 31.8 32.7 33.6 30.2 31.2 32.1 33.0 33.9 30.4 31.4 32.4 33.3 34.1 30.7 31.7 32.6 33.5 34.4 31.0 32.0 32.9 33.8 34.7 31.2 32.2 33.2 34.1 34.9 31.4 32.4 33.4 34.3 35.2 31.7 32.7 33.7 34.6 35.5 31.9 32.9 33.9 34.8 35.7 110 120 130 140 150 262 279 295 312 328 361 394 427 459 492 525 558 591 623 656 722 787 853 919 984 160 170 180 190 200 220 240 260 280 300 29.9 30.7 31.5 32.3 33.1 34.5 35.9 37.3 38.6 39.8 30.5 31.3 32.1 32.9 33.7 35.1 36.5 37.9 39.2 40.4 31.0 31.9 32.7 33.4 34.2 35.7 37.0 38.4 39.7 40.9 31.5 32.3 33.1 33.9 34.6 36.1 37.5 38.9 40.1 41.4 32.0 32.9 33.7 34.4 35.2 36.7 38.1 39.4 40.7 41.9 32.4 33.2 34.1 34.8 35.6 37.0 38.4 39.8 41.1 42.3 32.8 33.6 34.4 35.2 35.9 37.4 38.8 40.1 41.4 42.7 33.2 34.0 34.9 35.6 36.4 37.8 39.2 40.6 41.9 43.1 33.5 34.4 35.2 35.9 36.7 38.2 39.5 40.9 42.2 43.4 33.8 34.7 35.5 36.2 37.0 38.5 39.8 41.2 42.5 43.7 160 170 180 190 200 220 240 260 280 300 525 558 591 623 656 722 787 853 919 984 525 558 591 623 656 722 787 853 919 984 160 170 180 190 200 34.1 34.9 35.7 36.5 37.3 34.5 35.3 36.1 36.9 37.6 34.7 35.6 36.4 37.1 37.9 35.0 35.8 36.6 37.4 38.2 35.2 36.1 36.9 37.6 38.4 35.6 36.4 37.2 38.0 38.7 35.8 36.6 37.4 38.2 39.0 36.0 36.9 37.7 38.4 39.2 36.3 37.1 37.9 38.7 39.5 36.5 37.4 38.2 38.9 39.7 160 170 180 190 200 220 240 260 280 300 38.7 40.1 41.5 42.8 44.0 39.1 40.5 41.8 43.1 44.4 39.4 40.8 42.1 43.4 44.6 39.6 41.0 42.4 43.7 44.9 39.9 41.3 42.6 43.9 45.1 40.2 41.6 42.9 44.2 45.5 40.4 41.8 43.2 44.5 45.7 40.7 42.0 43.4 44.7 45.9 40.9 42.3 43.7 45.0 46.2 41.2 42.5 43.9 45.2 46.4 220 240 260 280 300 525 558 591 623 656 722 787 853 919 984 TABLE 13 Geographic Range Object Height Height of eye of observer in feet and meters Feet 72 Meters 75 79 82 85 89 92 Object Height 95 98 115 22 23 24 25 26 27 28 29 30 35 Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles Feet Meters 9.9 12.0 13.0 13.6 14.1 10.2 12.2 13.3 13.9 14.4 10.4 12.4 13.5 14.1 14.6 10.6 12.6 13.7 14.3 14.8 10.8 12.8 13.9 14.5 15.0 11.0 13.1 14.1 14.7 15.3 11.2 13.2 14.3 14.9 15.4 11.4 13.4 14.5 15.1 15.6 11.6 13.6 14.7 15.3 15.8 12.5 14.6 15.6 16.2 16.8 10 13 16 20 23 26 30 33 36 39 43 46 10 11 12 13 14 14.6 15.2 15.5 15.9 16.3 16.6 16.9 17.2 17.6 17.9 14.9 15.4 15.8 16.2 16.6 16.9 17.2 17.5 17.9 18.1 15.1 15.6 16.0 16.4 16.8 17.1 17.4 17.7 18.1 18.3 15.3 15.8 16.2 16.6 17.0 17.3 17.6 17.9 18.3 18.5 15.5 16.0 16.4 16.8 17.2 17.5 17.8 18.1 18.5 18.7 15.7 16.3 16.6 17.0 17.4 17.8 18.1 18.3 18.7 19.0 15.9 16.5 16.8 17.2 17.6 17.9 18.2 18.5 18.9 19.2 16.1 16.6 17.0 17.4 17.8 18.1 18.4 18.7 19.1 19.3 16.3 16.8 17.2 17.5 18.0 18.3 18.6 18.9 19.3 19.5 17.2 17.8 18.2 18.5 19.0 19.3 19.6 19.8 20.2 20.5 10 11 12 13 14 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 72 79 85 92 15 16 17 18 19 20 22 24 26 28 18.1 18.4 18.7 18.9 19.1 19.4 19.9 20.3 20.7 21.2 18.4 18.6 19.0 19.2 19.4 19.7 20.1 20.6 21.0 21.4 18.6 18.8 19.2 19.4 19.6 19.9 20.3 20.8 21.2 21.6 18.8 19.0 19.4 19.6 19.8 20.1 20.5 21.0 21.4 21.8 19.0 19.2 19.5 19.8 20.0 20.3 20.7 21.2 21.6 22.0 19.2 19.5 19.8 20.0 20.3 20.5 21.0 21.4 21.8 22.3 19.4 19.7 20.0 20.2 20.4 20.7 21.2 21.6 22.0 22.4 19.6 19.8 20.2 20.4 20.6 20.9 21.3 21.8 22.2 22.6 19.8 20.0 20.3 20.6 20.8 21.1 21.5 22.0 22.4 22.8 20.7 21.0 21.3 21.5 21.8 22.0 22.5 22.9 23.3 23.8 15 16 17 18 19 20 22 24 26 28 49 52 56 59 62 66 72 79 85 92 98 115 131 148 164 180 197 213 230 246 262 279 295 312 328 361 394 427 459 492 525 558 591 623 656 722 787 853 919 984 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 110 120 130 140 150 160 170 180 190 200 220 240 260 280 300 21.5 22.5 23.3 24.2 24.9 25.6 26.3 27.0 27.7 28.3 28.9 29.5 30.0 30.6 31.1 32.2 33.2 34.1 35.0 35.9 36.7 37.6 38.4 39.1 39.9 41.4 42.8 44.1 45.4 46.6 21.8 22.7 23.6 24.4 25.2 25.9 26.6 27.3 27.9 28.6 29.1 29.7 30.3 30.9 31.4 32.4 33.4 34.4 35.3 36.2 37.0 37.8 38.6 39.4 40.2 41.6 43.0 44.4 45.7 46.9 22.0 22.9 23.8 24.6 25.4 26.1 26.8 27.5 28.1 28.7 29.3 29.9 30.5 31.1 31.6 32.6 33.6 34.6 35.5 36.4 37.2 38.0 38.8 39.6 40.4 41.8 43.2 44.6 45.9 47.1 22.2 23.1 24.0 24.8 25.6 26.3 27.0 27.7 28.3 28.9 29.5 30.1 30.7 31.3 31.8 32.8 33.8 34.8 35.7 36.5 37.4 38.2 39.0 39.8 40.6 42.0 43.4 44.8 46.1 47.3 22.4 23.3 24.2 25.0 25.8 26.5 27.2 27.9 28.5 29.1 29.7 30.3 30.9 31.4 32.0 33.0 34.0 35.0 35.9 36.7 37.6 38.4 39.2 40.0 40.8 42.2 43.6 45.0 46.3 47.5 22.6 23.6 24.4 25.3 26.0 26.7 27.5 28.1 28.8 29.4 30.0 30.6 31.1 31.7 32.2 33.3 34.3 35.2 36.1 37.0 37.8 38.7 39.5 40.2 41.0 42.5 43.9 45.2 46.5 47.7 22.8 23.8 24.6 25.5 26.2 26.9 27.6 28.3 29.0 29.6 30.1 30.8 31.3 31.9 32.4 33.5 34.4 35.4 36.3 37.2 38.0 38.9 39.7 40.4 41.2 42.7 44.0 45.4 46.7 47.9 23.0 24.0 24.8 25.6 26.4 27.1 27.8 28.5 29.1 29.7 30.3 30.9 31.5 32.1 32.6 33.6 34.6 35.6 36.5 37.3 38.2 39.0 39.8 40.6 41.4 42.8 44.2 45.6 46.9 48.1 23.2 24.1 25.0 25.8 26.6 27.3 28.0 28.7 29.3 29.9 30.5 31.1 31.7 32.2 32.8 33.8 34.8 35.8 36.6 37.5 38.4 39.2 40.0 40.8 41.5 43.0 44.4 45.8 47.1 48.3 24.1 25.1 25.9 26.8 27.5 28.2 29.0 29.6 30.3 30.9 31.5 32.1 32.6 33.2 33.7 34.8 35.8 36.7 37.6 38.5 39.4 40.2 41.0 41.8 42.5 44.0 45.4 46.7 48.0 49.2 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 110 120 130 140 150 160 170 180 190 200 220 240 260 280 300 98 115 131 148 164 180 197 213 230 246 262 279 295 312 328 361 394 427 459 492 525 558 591 623 656 722 787 853 919 984 681 10 13