TABLE 15 TABLE 15 Distance by Vertical Angle Measured Between Sea Horizon and Top of Object Beyond Sea Horizon Distance by Vertical Angle Measured Between Sea Horizon and Top of Object Beyond Sea Horizon Difference in feet between height of object and height of eye of observer Angle ° ′ –0 –0 –0 –0 0 0 0 0 0 0 0 0 0 0 1 1 1 04 03 02 01 00 01 02 03 04 05 06 07 08 09 10 15 20 25 30 35 40 45 50 55 00 10 20 30 40 50 Difference in feet between height of object and height of eye of observer 25 30 35 40 45 50 60 70 80 90 Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles 12 10 7 8 3 1 12 10 9 7 4 2 2 1 13 11 9 2 0 13 11 10 7 4 1 1 6 5 14 12 10 8 4 0 6 5 14 12 11 4 7 8 1 6 5 15 13 11 10 9 4 3 3 1 1 0 7 6 15 14 12 11 6 5 5 1 0 7 16 14 13 11 10 7 5 2 1 0 8 6 5 16 15 13 12 11 9 6 5 3 1 0 6 5 Angle ° –0 –0 –0 –0 0 0 0 0 0 0 0 0 0 0 1 1 1 ′ 04 03 02 01 00 01 02 03 04 05 06 07 08 09 10 15 20 25 30 35 40 45 50 55 00 10 20 30 40 50 Angle ° 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 2 3 4 10 ′ 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 20 25 30 35 40 45 50 55 00 10 20 30 40 50 00 30 00 30 00 30 00 00 00 00 00 100 120 140 160 180 200 250 300 350 400 450 Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles 11 10 8 6 5 4 2 1 0 6 5 12 11 10 8 9 5 4 2 2 1 0 8 6 13 12 11 10 9 7 7 5 7 2 1 0 7 14 13 12 11 10 9 8 7 6 4 2 1 0 8 15 14 13 12 11 10 10 8 7 6 8 2 2 1 0 16 15 14 13 12 11 10 10 9 7 6 2 1 0 5 18 17 16 15 14 13 12 11 11 10 10 9 8 4 8 5 20 19 17 16 16 15 14 13 12 12 11 10 10 9 9 6 3 1 1 6 21 20 19 18 17 16 15 15 14 13 12 12 11 11 10 10 7 2 2 1 7 5 23 22 21 20 19 18 17 16 15 14 14 13 13 12 11 11 9 4 4 2 2 1 8 5 24 23 22 21 20 19 18 17 16 16 15 14 14 13 13 12 10 7 4 1 1 Angle ° 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 2 3 4 10 ′ 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 20 25 30 35 40 45 50 55 00 10 20 30 40 50 00 30 00 30 00 30 00 00 00 00 00 683 684 TABLE 15 Distance by Vertical Angle Measured Between Sea Horizon and Top of Object Beyond Sea Horizon Angle ° 0 0 0 0 0 0 0 0 0 0 1 1 1 2 3 10 12 15 20 25 30 Difference in feet between height of object and height of eye of observer 500 600 700 800 900 1000 1200 1400 1600 1800 2000 ′ Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles Miles 05 06 07 08 09 10 11 12 13 14 15 17 20 25 30 35 40 45 50 55 00 10 20 30 40 50 00 30 00 30 00 00 00 00 00 00 00 00 00 00 00 20 19 19 18 17 16 16 15 14 14 13 12 11 6 5 9 23 22 21 20 19 19 18 17 16 16 15 14 13 11 9 8 5 7 3 2 1 25 24 23 22 21 21 20 19 19 18 17 16 15 13 11 10 8 5 3 3 2 1 27 26 25 24 23 23 22 21 20 20 19 18 16 14 12 11 10 8 5 4 1 1 29 28 27 26 25 25 24 23 22 22 21 20 18 16 14 12 11 10 8 5 5 4 1 1 31 30 29 28 27 26 26 25 24 23 23 21 20 17 15 13 12 11 10 9 7 5 7 9 34 33 32 31 31 30 29 28 27 26 26 24 23 20 18 16 14 13 12 11 10 6 5 2 1 38 37 36 35 34 33 32 31 30 30 29 27 25 22 20 18 16 15 14 13 12 10 7 5 4 3 2 1 41 40 39 38 37 36 35 34 33 32 32 30 28 25 22 20 18 17 16 14 13 12 10 8 3 1 0 43 42 41 40 39 38 38 37 36 35 34 33 31 27 25 22 20 19 17 16 15 13 12 10 9 8 4 1 1 46 45 44 43 42 41 40 39 38 38 37 35 33 30 27 24 22 21 19 18 16 14 13 11 10 9 7 7 9 Angle ° 0 0 0 0 0 0 0 0 0 0 1 1 1 2 3 10 12 15 20 25 30 ′ 05 06 07 08 09 10 11 12 13 14 15 17 20 25 30 35 40 45 50 55 00 10 20 30 40 50 00 30 00 30 00 00 00 00 00 00 00 00 00 00 00