82 VISIBILITY TABLE 
The aviator can find from this table the radius of his vision under good weather 
conditions. It will also aid in estimating the distance of a place within or on 
his horizon. 
Distance of visibility of objects at sea or distance to horizon 
Height, | Nautical Statute Height, | Nautical Statute Height, Nautical | Statute 
in feet miles Iiles in feet mniles miles in feet mniles miles 
1 ibpal 13 100 It 5 13. 2 31. 6 36. 4 
2 nd 1.9 105 Hale 7 13. 5 32. 0 36. 9 
3 2. 0 ns 3 110 IPA) 13. 8 32. 4 31.3 
4 7) 2. 6 115 Pa: 14.1 32. 8 37. 8 
5 25 2.9 120 12. 6 14. 5 30. 2 38. 3 
6 2.8 3. 2 125 12.9 14.8 33. 6 38. 7 
U 2.9 By 130 13. 1 Tey a 34. 0 39. 2 
8 3. 1 BH if 135 13. 3 15. 3 34. 4 39. 6 
9 3. 5 4.0 140 13. 6 15. 6 34. 7 40. 0 
10 | 3. 6 4.2 145 13. 8 15.9 S02 40. 5 
11 3. 8 4.4 150 14.1 35. 5 40. 9 
12 4.0 4.6 160 14.5 35. 9 41.3 
13 4,2 4.8 170 14. 9 36. 2 41.7 
14 4.3 4.9 180 15. 4 38. 0 43. 8 
15 4.4 yal 190 15.8 39. 6 45. 6 
16 4.6 3 200 16. 2 41.3 47. 6 
17 4.7 4 210 16. 6 42.9 49. 4 
18 4.9 6 220 Ie 44, 4 51.1 
19 5. 0 8 230 17. 4 45. 8 52.8 
20 SU 9 240 Ua 47.2 54. 4 
21 5. 3 ll 18. 2 48. 6 56. 0 
22 5. 4 ee 18. 5 49. 9 55 
23 5.5 me 18. 9 +) By 59. 0 
24 5. 6 m3) 19. 2 52.5 60. 5 
25 Hf . 6 19. 6 53. 8 61. 9 
26 5. 8 BITE 19.9 55. 0 63. 3 
27 6. 0 9 20. 1 56. 2 64. 7 
28 6. 1 0 20. 5 Stee 66. 0 
29 6. 2 1 20. 8 58. 5 67. 3 
30 6. 3 2 Paar | 59. 6 68. 6 
31 6. 4 3 21.5 60. 6 69. 8 
32 625 5 PA earl 61.8 fil ley, | 
33 6. 6 6 22: 1 62. 8 12.3 
34 6. 7 ai 22.3 63. 8 fans 
35 6. 8 8 22.7 64. 9 74. 7 
36 6. 9 9 22. 9 65. 9 75.9 
37 6. 9 0 PB, Pe 66. 9 77.0 
38 (0 1 2320 67. 8 78. 1 
39 Tal 2 Zo 68. 8 79. 2 
40 (2 3 24.1 69. 7 80. 3 
41 ee 4 24. 3 Oma 81. 4 
42 7.4 5 24. 6 71.6 82. 4 
43 (aS 7 24.8 CPAs 3: 83. 5 
44 7.6 8 25. 1 73. 4 84. 5 
45 (20 .9 25. 4 74. 3 85. 6 
46 7.8 . O 25. 6 ) oe 86. 6 
47 7.9 . O 26. 1 | 76. 1 87. 6 
48 7.9 1 PAT Lh ! 76. 9 88. 5 
49 8. 0 2 Dien : fies 89. 5 
50 8.1 3 27. 6 ; 78. 6 90. 5 
55 8. 5 8 28. 0 HB 79. 4 91.4 
60 8.9 ee, 28. 6 9 80. 2 92. 4 
65 9. 2 . 6 29. 0 4 81. 0 o3na 
70 9. 6 0 29. 4 9 88. 8 102. 2 
75 9.9 4 29. 9 4 96. 0 110. 5 
80 10. 3 .8 30. 3 9 102. 6 LTS ae 
85 10. 6 Meer SONG 4 108. 7 125. 2 
90 10. 9 Be) ole . 9 114. 6 132. 0 
95 Tals 9 9 
