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The declination of the sun and any other celestial body, for any year, is found in a publication called the Nautical Almanac, published at Washington, D. C., by the United States Navy Department, Bureau of Equipment.

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2

16 51 47
16 34 19

6 30 25 6 7 19

16 II 35

5 44 8

6 22 35

16 45 23

4 34 6

7 30 6

8 36 29

18 19 55

1 S 23 I 28 S 17 8 57 S 7 39 11 N 4 27 57 N 15 O 50 N 22 I 44 22 56 21

7 16 22 4 51 4 15 18 55 22 9 47 3 22 50 47

6 53 26 5 14 5 15 36 44 22 17 27 4 22 44 46 16 16 34 5 37 I 15 54 17

22 24 44 5 22 38 18 15 58 32

5 59 51

22 31 37 6 22 31 23 15 40 14

16 28 37 22 38 7 7 22 24 1 15 21 39 5 20 51

6 45 12

22 44 13 8

22 16 13 15 2 48 4 57 31 7 743 17 I 51 22 49 54 9 22

7 58
14 43 43

17 18 3 22 55 12 IO 21 59 18 14 24 22 4 10 38

7 52 22 17 33 58 23 06 II 21 50 II 14 4 47 3 17 7

8 14 30 17 49 35

23 4 36 12 21 40 40 13 44 58 3 23 33

18 4 54

23 8 41 13 21 30 42 13 24 56 2 59 56 8 58 21

23 12 21 14 21 20 20 13 4 40 2 36 18

9 20 3 18 34 38 23 15 37 15 21 9 33 12 44 II 2 12 38

9 41 36

18 49 2 23 18 29 16 20 58 22 12 23 30 I 48 56 IO 3 0 19 3 7 23 20 56 17 20 46 47 I2 2 36 I 25 13 10 24 13

19 16 52 23 22 58 18 20 34 48 II 41 33

I I 30
10 45 17
ID 30 18

23 24 35 19 20 22 26

II 20 18

0 37 47

II
6 10

19 43 24 23 25 48 20 20 9 40 10 58 52 S o 14 4

11 26 51

19 56 10 23 26 36 21 19 56 32 10 37 16 No 9 38 II 47 22 20 8 36 23 26 59 22 19 43 2 10 15 30

0 33 20 I2 7 41 20 20 41 23 26 57 1929 10

9 53 34
0 56 59 12 27 47

20 32 25 23 26 31 24 19 14 56 9 31 30 I 20 38 12 47 42

20 43 48 23 25 39 25 19 0 21

I 44 14 13 7 24 20 54 50 23 24 23 26 18 45 25

8 46 57

7.47

13 26 52 21 5 30 23 22 43 27

23

9 9 18

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2

9
8 24 29
2 31 18

21 15 48 23 20 37 28 18 14 33 S 8 I 53 2 54 46 14 5 10

21 25 44 29 17 58 38

3 18 10

14 23 58 21 35 18 23 15 13 30 17 42 23

3 41 30 N 14 42 31 21 44 29 N 23 11 54 31 S 17 25 49

N4 4 46

N 21 53 18

18 30

13 46 8

23 18 8

9. The Amplitude Table, – The true amplitude of the sun at rising or setting may be found by inspection of the accompanying Table of Amplitudes. This table, it will be observed, is prepared especially for the region of the

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2

3 29 18

0 24

un

17 19 6

4 15 46

15 19 6

6 32 9

2

2

16 46 44 16 30 9

5 24 36

0 59

7 19 10

2

23 4 26

3 53 18

8 47

14 8 16

23 16 6

I N 23 8 II N 18 5 29 N 8 22 27 S 3 6 I S 14 22 18 S 21 47 3 23 4 4 17 50 19

8 0 38

14 41 28

21 56 15 3 22 59 32 17 34 51 7 38 42 3 52 34 15

22 5 2 4 22 54 36 7 16 38

22 13 23 5 22 49 17 17 3 3

6 54 27
4 38 56

15. 37 33 22 21 19 6 22 43 33

15 55 44

22 28 49 7 22 37 26

6 9 44
5 25 5
16 13 39

22 35 52 8 22 30 55

16 13 18 5 47 13 5 48 4 16 31 78 22 42 28 9 22 24 I 15 56 II

6 10 58
16 48 40

22 48 38 ΙΟ 22 16 43 15 38 48 5 I 54

6 33 47

17 5 45 22 54 21 II 22 9 3 15 21 II 4 39 7

6 56 31

17 22 32 22 59 37 I 2 22

15 3 18
4 16 14

17 39
13 21 52 33
14 45 12

7 41 42 17 55 13 23 14 21 43 45 14 26 51 3 30 17 8 4 8 18 II 6

23 12 40 15 21 34 34

3 7 12 8 26 28

18 26 39
16
21 25

I
13 49 28
2 44 4
8 48 40
18 41 53

23 19 3 17 21 15 6

2 20 53 9 10 44

18 56 46 23 21 33 18 21 4 49 13 II 12

I 57 39 9 32 41 19 II 20 23 23 35 19 20 54 12 12 51 46 I 34 22 9 54 29 19 25 33

23 25 8 20 20 43 13

12 32 7

I II 4

IO 16

8

19 39 24 23 26 14 20 31 53 12 12 16 0 47 44 IO 37 9

19 52 55 23 26 51 22 20 20 12

II 52 14
0 24 22

20 6 3 23 27 O 23 20

I No 0 59
II 20 IO 20 18 50

23 26 41 19 55 51 II II 36 S 0 22 24 II 41 11 20 31 13 23 25 53 25 19 13 10

IO 51

I 0 45 48 I2 2 I 20 43 14 23 24 37 26 19 30 9 10 30 16 I

12 22 39 20 54 52 23 22 53 27 19 16 50 IO

I 32 35 12 43

21 6 7 23 20 41 28 19 3 II 9 18 17 1 55 58 13

21 16 57

O 29 18 19 13

927 2 19 20 13 23 25 21 27 24 23 14 51 30 18 34 56 9 5 39

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13 43 16 S 21 37 26

23 II 15 31 N 18 20 22 N 8 44 7

S14 2 54

S 23 7 10

S 2 42 41

Great Lakes, and contains the amplitudes, only, for the latitude parallels between 40° and 50o, inclusive, and for declinations from t° up to 30°. In order to use this table, therefore, the latitude of the ship and the declination of

10
2

TABLE II

TABLE OF TRUE AMPLITUDES
For parallels of latitude between 10° and 50°, inclusive

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1.3

1.4

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30

2.1

20

2.7

2.8

3.6

3.6

3.8

39

5.1

5.2

5.6

5.8

6.1

30 to 4°

30'

6.3

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30' 0.7° 0.7° 0.7° 0.70! 0.7° 0.7° 0.79 0.7° 0.7° 0.7° 0.8° 1.3 1.3

1.3

1.4 1.4 1.4 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.1

2.2 2.2 2.2 2.2 2.3
2.6
2.6
2.7

2.8
2.9

2.9 3.0 3.0 3.1 2° 30' 3.3 3.3 3.4 3.7 3.5 3.5

3.7

3.9 3.9 4.0 4.0 4.1 4.2 4.2 4.3 4.4 4.5

4.6

4.7 4.6 4.6

7.7
4.8
4.9 5.0 5.0

5.2 5.3 5.4. 5.3 5.4 5.5

5.7

5.9
6.0

6.2
5.9
6.0 6.1 6.2

6.4 6.5 6.6 6.7 6.9 7.0 6.5 6.6 6.7. 6.8

7.4 7.5 7.7

7.8 7.2 7.3 7.7 7.5 7.6 7.7 7.9

8.0
8.2

8.6 7.8 7.9 8.0 8.1 i 8.3

8.6 8.8

9.0 9.2 9.3 8.5 8.6 8.8

8.9 9.1 9.2 9.4 9.6 9.7 9.9 IO.I 9.1 9.2 9.4 9.6

9.7

9.9 10. I 10.3 10.5 10.7 10.9 7° 30' 9.9 IO. I 10.3 10.6 10.8 I1.0 11.2 11.5

11.7 10.5 10.6 10.8 11.0 III 11.3 11.5 11.8

I 2.0 12.3 12.5
ILI I1.2 I1.5 11.7 I1.9 12.1 12.3 12.6 12.8 13.1 13.3
I1.7 11.9
I 2.1 12.3 12.5

12.8

13.0 13.3 13.5 13.8 14.1 9° 30' 12.4 12.6 12.8 13.0 13.3 13.6 13.8 14.1 14.3 14.6 14.9

13.1 13.3 13.5 13.8 14.0 14.3 14.5 14.8 15.0 15.4 15.7 10° 30' 13.8 14.0 14.2 14.5 14.7 15.0 15.2 15.5 15.8 16.2 16.5

14.4 14.6 14.8 15.0 15.3 15.6 15.9 16.3 16.6 17.0 17.3 11° 30' 15.1 15.3 15.6 15.8 16.1 16.4 16.7 17.0 17.3 17.7 18.1

15.7 16.0 16.2 16.5 16.8 17.1 17.4 17.7 18. I 18.5 18.9 12° 30' 16.4 16.7 16.9 17.2 17.5 17.8 18.2 '18.5 18.9 19.3 19.7

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17.1 17.3 '17.6 17.9 18.2 18.5 18.9 19.3 19.7 20.1 20.5 13° 30' 17.8 18.0 18.3 18.6 18.9 19.3 19.6 20.0 20.4 20.8 21.3

18.4 18.7 19.0 19.3 19.6 20.0 20.4 20.8 21.2 21.6 22.1 14° 30' 19.1 19.4.19.7 20.0 20.4 20.7 12

21.I 21.5

22.4 15° 19.7 20.0 20.4 20.7 2I.I 21.5 21.9 22.3 22.8 23.2 23.7

13°

14°

1

22.0

22.9

the sun must be known. The table is then entered with the latitude at the top and the declination in the side column, when under the former and opposite the latter is found the true amplitude, which is named cast at rising, west

TABLE II-(Continued)

TABLE OF TRUE AMPLITUDES
For parallels of latitude between 40° and 50°, inclusive

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16°

21.I

22.1

17° 17°

30'

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18°

18°

30' 19°

30'

21°

15° 30' 20.4° 20.8° 21.1° 21.4° 21.8° 22.2° 22.6° 23.1° 23.6° 24.1° 24.6°

21.4

21.8 22.2 22.6 23.0 23.4 23.8 24.3 24.9 25.4 16° 30' 21.8 22.5 22.9 23.3 23.7 24.1 24.6 25.1 25.7 26.2

22.4 22.8 23.2 23.6 24.0 24.4 24.9 25.4 25.9 26.5 27.0 23.1 23.5 23.9 24.3 24.7 25.2 25.7 26.2 26.7 27.3 27.9 23.8 24.2 24.6 25.0 25.4 25.9 26.4 26.9 27.5 28.1 28.7 24.4 24.8 25.3 25.7 26.2 26.7 27.2 27.7 28.3 28.9 29.6

25.1 25.5 26.0 26.4 26.9 27.4 27.9 28.5 29.1 29.7 30.4 19°

25.8 26.2 26.7 27.2 27.7 28.2 28.7 29.3 29.9 30.6 31.3 20°

26.5 26.9 27.4 27.9 28.4 28.9 29.5 30.1 30.7 31.4 32. I 20° 30' 27.2 27.7 28.1 28.6 29.1 29.7 30.3 30.9 31.6 32.3 33.0

27.9 28.3 28.8 29.3 29.8 30.4 31.0 31.7 32.4 33.1 33.9 21° 30' 28.6 29.1 29.6 30.1 30.6 31.2 31.8 32.5 33.2 34.0 34.8 22° 29.3 29.8 30.3 30.8 31.4 32.0 32.6 33.3 34.0 34.8 35.6 22° 30' 30.0 30.5 31.0 31.6 32.2 32.8 33.4 34.1 34.9 35.7 36.5

30.7 31.2 31.7 32.3 32.9 33.5 34.2 34.9 35.7 36.5 37.4 23° 30' 31.3 31.8 32.4 33.0 33.6 34.3 35.0 35.7 36.5 37.4 38.3 24° 32.1 32.6 33.2 33.8 34.4 35.1 35.8 36.6 37.4 38.3 39.2 24° 30' 32.8 33.3 33.9 34.5 35.2 35.9 36.6 37.4 38.3 39.2 40.2 25°

33.5 34.1 34.7 35.3 36.0 36.7 37.5 38.3 39.2 40.1 41.1 25° 30' 34.2 34.8 35.4 36.1 36.8 37.5 38.3 39. I

40.0 41.0 42.0 34.9 35.5 36.1 36.8 37.5 38.3 39.1 40.0 40.9 41.9 43.0 26° 30' 35.6 36.2 36.9 37.6 38.3 39.1 40.0 40.9 41.8 42.8 43.9

23°

26°

270

36.3 37.0 37.7 38.4 39.1 39.9 40.8 41.7 42.7 43.8 44.9 27° 30' 37.1 37.7 38.4 39.2 40.0 40.8 41.7 42.6 43.6 44.7 45.9

37.8 38.5 39.2 39.9 40.7 41.6 42.5 43.5 44.6 45.7 46.9 38.5 39.2 39.9 40.7 141.6 42.5 43.4 44.4 45.5 46.7 47.9

39.3 40.0 10.7 41.5 42.4 43.3 44.3 45.3 46.4 47.6 48.9 29° 30' 40.0 40.7 41.5 42.3 43.2 44.1 45.1 46.2 47.4 48.6 50.0

40.7 41.5 42.3 43.1 44.0 45.0 46.0 47.1 48.3 49.6 51.1

28° 280

30' 29°

at setting, and north or south, according to whether the declination is north or south. Thus, if the latitude in is 42° N, and the declination of the sun is 21° S, the observation being taken at sunrise, the true amplitude is E 28.8° S. Again, if the latitude of the ship is 47° N, and the declination 13° 30' N, the observation being taken at sunset, the true amplitude is W 20° N. This table may be used for any celestial body, the declination of which comes within the limits of the table.

A complete set of tables containing the true amplitude for latitude parallels from 10° to 77o, inclusive, is incorporated in the Nautical Tables accompanying this Course, for the convenience of navigators engaged in coastwise navigation elsewhere than on the Great Lakes. These tables are to be entered with the declination at the top and the latitude at the side column. The amplitude found from these tables should be named the same as that found from Table II.

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