| 2 ) | 165° 30' 16" | |||
| —————— | ||||
| ½ S | 82° 45' 08" | cos. | 9.10106 - 13 | |
| T.C.A. | 19 56 52 | |||
| —————— | ||||
| Diff. | 62° 48' 16" | sin. | 9.94911 + 2 | |
| ———— | ||||
| 9.17785 | ||||
| - 11 | ||||
| ———— | ||||
| log. hav. Star's H.A. at ship | 9.17774 | |||
| Star's H.A. | 3h 02m 40s |
| Star's R.A. | 6 41 39 |
| ——————— | |
| L.S.T. | 9h 44m 19s |
| G.S.T. | 4 27 01 |
| ——————— | |
| Lo. in T. | 5h 17m 18s E |
| Longitude in | 79° 19' 30" E |
Assign for Night Work or work in the class room examples similar to the following:
1. April 16, 1919, in Latitude 11° 47' S. Observed altitude of the Star Aldebaran, West of the meridian 23° 13' 20". CT 6h 58m 29s. CC 2m 27s fast. IE - 2' 00". HE 26 ft. Required longitude in.
2. Dec. 10th, 1919. Observed altitude of Star Sirius 20° 05' 40" West of meridian. CT 11h 45m 29s. CC 1m 28s slow. IE - 1' 20". HE 21 ft. D.R. latitude 38° 57' N. Required longitude in.
Note to Instructor: If any time in the period is left or for Night Work assign examples to be worked by Marc St. Hilaire Method, changing slightly the D.R. Lat. and Longitude just obtained by the Time Sight Method.
WEDNESDAY LECTURE
Examples on Longitude by Chronometer Sight of a Star
1. Dec. 9th, 1919. In latitude 36° 48' N. Observed altitude Star Capella, East of meridian 46° 18' 30". IE 2' 50" off arc. HE 33 ft. CT 10d 3h 05m 05s A.M. CC 1m 18s slow. Declination of star is 45" 55' N. Required longitude in.