the american practical navigator table 14 dip of the sea short of the horizon

TABLE 14
Dip of the Sea Short of the Horizon

Height of eye above the sea, in feet and (meters)
Distance
Miles

0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5

2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.5
6.0
6.5
7.0
7.5

8.0
8.5
9.0
9.5
10.0

682

TABLE 14
Dip of the Sea Short of the Horizon

5
(1.5)

10
(3.0)

15
(4.6)

20
(6.1)

25
(7.6)

30
(9.1)

′

14.2
9.6
7.2
5.9
5.0
4.3
3.9
3.5
3.2
3.0
2.9
2.7
2.6
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2

2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2

′
28.4
19.0
14.3
11.5
9.7
8.4
7.4
6.7
6.1
5.6
5.2
4.9
4.6
4.4
4.2
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.4
3.3
3.3
3.2
3.2
3.2
3.1

3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1

′
42.5
28.4
21.4
17.2
14.4
12.4
10.9
9.8
8.9
8.2
7.6
7.1
6.6
6.3
6.0
5.7
5.5
5.3
5.1
4.9
4.8
4.6
4.5
4.4
4.3
4.3
4.2
4.1

4.1
4.0
4.0
3.9
3.9
3.9
3.9
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8
3.8

3.8

′
56.7
37.8
28.5
22.8
19.1
16.5
14.5
12.9
11.7
10.7
9.9
9.2
8.7
8.2
7.7
7.4
7.0
6.7
6.5
6.3
6.1
5.9
5.7
5.6
5.4
5.3
5.2

5.1
5.0
4.9
4.9
4.8
4.7
4.7
4.6
4.6
4.6
4.5
4.5
4.5
4.4
4.4
4.4
4.4
4.4
4.4
4.4
4.3
4.3
4.3
4.3
4.3
4.3
4.3
4.3
4.3
4.3

4.3
4.3

′
70.8
47.3
35.5
28.5
23.8
20.5
18.0
16.1
14.6
13.3
12.3
11.4
10.7
10.1
9.5
9.0
8.6
8.2
7.9
7.6
7.3
7.1
6.9
6.7
6.5
6.4

6.2
6.1
6.0
5.9
5.8
5.7
5.6
5.5
5.4
5.4
5.3
5.2
5.2
5.2
5.1
5.1
5.0
5.0
5.0
5.0
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9

4.9
4.9
4.9

′
84.9
56.7
42.6
34.2
28.5
24.5
21.5
19.2
17.4
15.9
14.6
13.6
12.7
11.9
11.3
10.7
10.2
9.7
9.3
9.0
8.6
8.3
8.1
7.8
7.6

7.4
7.2
7.1
6.9
6.8
6.6
6.5
6.4
6.3
6.2
6.1
6.0
6.0
5.9
5.8
5.8
5.7
5.7
5.6
5.6
5.6
5.5
5.5
5.5
5.4
5.3
5.3
5.3
5.3
5.3

5.3
5.3
5.3
5.3

35
(10.7)

′
99.1
66.1
49.7
39.8
33.3
28.6
25.1
22.4
20.2
18.5
17.0
15.8
14.7
13.8
13.0
12.4
11.7
11.2
10.7
10.3
9.9

9.6
9.2
9.0
8.7
8.5
8.2
8.0
7.8
7.7
7.5
7.4
7.2
7.1
7.0
6.9
6.8
6.7
6.6
6.5
6.5
6.4
6.3
6.3
6.2
6.2
6.1
6.1
6.0
5.9
5.8

5.7
5.7
5.7
5.7
5.7
5.7
5.7
5.7

40
(12.2)

′
113.2
75.6
56.7
45.5
38.0
32.6
28.6
25.5
23.0
21.0
19.4
17.9
16.7
15.7
14.8
14.0
13.3

12.7
12.1
11.7
11.2
10.8
10.4
10.1
9.8
9.5
9.2
9.0
8.8
8.6
8.4
8.2
8.1
7.9
7.8
7.7
7.5
7.4
7.3
7.2
7.1
7.1
7.0
6.9
6.8
6.8
6.7

6.7
6.6
6.4
6.3
6.2
6.1
6.1
6.1
6.1
6.1
6.1
6.1

Height of eye above the sea, in feet and (meters)
45
(13.7)

′
127.3
85.0
63.8
51.1
42.7
36.7
32.2
28.7
25.9
23.6
21.7
20.1

18.8
17.6
16.6
15.7
14.9
14.2
13.6
13.0
12.5
12.0
11.6
11.2
10.9
10.6
10.3
10.0
9.7
9.5
9.3
9.1
8.9
8.7
8.6
8.4
8.3
8.2
8.0
7.9
7.8
7.7

7.6
7.5
7.4
7.4
7.3
7.2
7.2
6.9
6.7
6.6
6.5
6.5
6.5
6.5
6.5
6.5
6.5

50
(15.2)

′
141.5
94.4
70.9
56.8
47.4
40.7
35.7
31.8

28.7
26.2
24.1
22.3
20.8
19.5
18.3
17.3
16.5
15.7
15.0
14.3
13.8
13.3
12.8
12.4
12.0
11.6
11.3
11.0
10.7
10.4
10.2
9.9
9.7
9.5
9.4
9.2
9.0
8.9

8.7
8.6
8.5
8.4
8.3
8.2
8.1
8.0
7.9
7.8
7.7
7.4
7.2
7.1
7.0
6.9
6.9
6.9
6.9
6.9
6.9

Distance

Distance

Miles

Miles

0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1

3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0

0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1

3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0

55
(16.8)

′
155.6
103.8
77.9
62.4
52.1
44.7
39.2
34.9
31.5
28.7
26.4
24.5
22.8
21.4
20.1
19.0
18.0
17.2
16.4
15.7
15.1
14.5
14.0
13.5
13.0
12.6

12.3
11.9
11.6
11.3
11.1
10.8
10.6
10.3
10.1
9.9
9.8
9.6
9.4
9.3
9.2
9.0
8.9
8.8
8.7
8.6
8.5
8.4
8.3
7.9
7.7
7.5
7.4
7.3
7.2
7.2

7.2
7.2
7.2

60
(18.3)

′
169.7
113.3
85.0
68.1
56.8
48.8
42.8
38.1
34.4
31.3
28.8
26.7
24.8
23.3
21.9
20.7
19.6
18.7
17.8
17.0
16.3
15.7

15.1
14.6
14.1
13.7
13.3
12.9
12.6
12.2
11.9
11.7
11.4
11.2
10.9
10.7
10.5
10.3
10.1
10.0
9.8
9.7
9.5
9.4
9.3
9.2
9.1
9.0
8.9
8.5
8.2
7.9

7.8
7.6
7.6
7.5
7.5
7.5
7.5

65
(19.8)

′
183.3
122.7
92.1
73.8
61.5
52.8
46.3
41.2
37.2
33.9
31.1
28.8
26.8
25.1
23.6
22.3
21.2
20.1

19.2
18.4
17.6
16.9
16.3
15.8
15.2
14.7
14.3
13.9
13.5
13.2
12.8
12.5
12.2
12.0
11.7
11.5
11.3
11.1
10.9
10.7
10.5
10.3
10.2
10.0
9.9
9.8
9.7
9.5

9.4
9.0
8.6
8.4
8.2
8.0
7.9
7.9
7.8
7.8
7.8

70
(21.3)

′
197.9
132.1
99.2
79.4
66.3
56.9
49.8
44.4
40.0
36.5
33.5
31.0
28.9
27.0

25.4
24.0
22.8
21.6
20.6
19.7
18.9
18.2
17.5
16.9
16.3
15.8
15.3
14.9
14.4
14.1
13.7
13.4
13.1
12.8
12.5
12.2
12.0
11.8
11.6
11.4
11.2
11.0
10.8
10.7

10.5
10.4
10.2
10.1
10.0
9.5
9.1
8.8
8.6
8.4
8.3
8.2
8.1
8.1
8.1

75
(22.9)

′
212.0
141.6
106.2
85.1
71.0
60.9
53.4
47.5
42.8
39.0

35.9
33.2
30.9
28.9
27.2
25.7
24.3
23.1
22.0
21.1
20.2
19.4
18.7
18.0
17.4
16.8
16.3
15.8
15.4
15.0
14.6
14.2
13.9
13.6
13.3
13.0
12.7
12.5
12.3
12.1

11.8
11.7
11.5
11.3
11.1
11.0
10.8
10.7
10.6
10.0
9.6
9.2
9.0
8.8
8.6
8.5
8.5
8.4
8.4

80
(24.4)

′
226.1
151.0
113.3
90.7
75.7
64.9

56.9
50.7
45.7
41.6
38.2
35.4
32.9
30.8
29.0
27.3
25.9
24.6
23.5
22.4
21.5
20.6
19.9
19.1
18.5
17.9
17.3
16.8
16.3
15.9
15.5
15.1
14.7
14.4
14.1
13.8

13.5
13.2
13.0
12.7
12.5
12.3
12.1
11.9
11.8
11.6
11.4
11.3
11.1
10.5
10.0
9.7
9.4
9.2
9.0
8.9
8.8
8.7
8.7

85
(25.9)

′
240.2
160.4

120.3
96.4
80.4
69.0
60.4
53.8
48.5
44.2
40.6
37.5
34.9
32.7
30.7
29.0
27.5
26.1
24.9
23.8
22.8
21.9
21.0
20.3
19.6
18.9
18.3
17.8
17.3
16.8
16.4
15.9

15.6
15.2
14.9
14.5
14.2
14.0
13.7
13.4
13.2
13.0
12.8
12.6
12.4
12.2
12.0
11.9
11.7
11.0
10.5
10.1
9.8
9.5
9.3
9.2
9.1
9.0
9.0

90
(27.4)

′
254.2
169.9
127.4
102.0
85.1
73.0
64.0
56.9
51.3
46.7
42.9
39.7
37.0
34.6
32.5
30.7
29.0
27.6
26.3
25.1
24.1
23.1
22.2
21.4
20.7
20.0
19.3
18.8

18.2
17.7
17.2
16.8
16.4
16.0
15.6
15.3
15.0
14.7
14.4
14.1
13.9
13.6
13.4
13.2
13.0
12.8
12.6
12.4
12.3
11.5
11.0
10.5
10.2
9.9
9.7
9.5
9.4
9.3

9.3

95
(29.0)

′
268.3
179.3
134.5
107.7
89.8
77.1
67.5
60.1
54.2
49.3
45.3
41.9
39.0
36.5
34.3
32.3
30.6
29.1
27.7
26.5
25.3
24.3
23.4
22.5

21.8
21.0
20.4
19.7
19.2
18.6
18.1
17.7
17.2
16.8
16.4
16.1
15.7
15.4
15.1
14.8
14.5
14.3
14.0
13.8
13.6
13.4
13.2
13.0
12.8
12.1
11.5
11.0
10.6
10.3

10.0
9.9
9.7
9.6
9.5

100
(30.5)

′
282.3
188.7
141.5
113.3
94.5
81.1
71.1
63.2
57.0
51.9
47.6
44.1
41.0
38.3
36.0
34.0
32.2
30.6
29.1
27.8

26.6
25.6
24.6
23.7
22.8
22.1
21.4
20.7
20.1
19.5
19.0
18.5
18.1
17.6
17.2
16.8
16.5
16.1
15.8
15.5
15.2
14.9
14.7
14.4
14.2
14.0
13.8
13.6
13.4
12.6

11.9
11.4
11.0
10.7
10.4
10.2
10.0
9.9
9.8

Distance
Miles

0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8

1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8

4.9
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0