| Lo. Factor = .93 | Lat. by Obs. | 33° 00' 26" N | |
| Lat. Diff. 9.5 | Lat. by D.R. | 32° 50' 54" N | |
| —— | —————— | ||
| Diff. Lo. 8.83 | Lat. Diff. | 9' 32" |
 | Since Obs. Lat. is East of D.R. Lat. on Line of Pos. Lo. Diff. is applied East. | ||
| Lo. by D.R. | 70° 29' 26" W | ||
| Lo. Diff. | 8 50 E | ||
| —————— | |||
| Lo. in at Noon | 70° 20' 36" W | ||
By Dead Reckoning from Noon to Noon
| Course | Dist. | D. Lat. | Dep. | D. Lo. |
|---|---|---|---|---|
| N 35° E | 78 | 63.9 | 44.7 | 176' or 2° 56' |
| N 40° E | 138.5 | 106.1 | 89. | |
| N 39° E | 24.5 | 19. | 15.4 | |
| —— | —— | |||
| 189. | 149.1 |
| Lat. left. | 30° 01' N | Lo. left | 73° 47' 20" W | |
| 3 09 N | 2 56 E | |||
| ———— | —————— | |||
| Lat. in | 33° 10' N | Lo. in | 70° 51' 20" W | |
| Min. Lat. | 31° 35' |
The Watch Time of Local Apparent Noon
Date—Jan. 26, 1919
G.A.T. of A.M. Sight 1h 16m 04s
Lo. in T. of A.M. sight 4 43 12
—————
L.A.T. 20h 32m 52s
Total Time to Noon 3h 27m 08s
Course to Noon — 39°
Change in Lo. per hr. — 5.2', 21s
3600s + 21s = 3621s
3 x 60 = 180
27
——
207
60
———
12,420
08
————
3621 ) 12,428 (3.43 hrs
10,863
———
15,650
14,484
———
11,660
10,863
———
3.43 hrs = 3h 25m 48s
W.T. of A.M. sight 8 31 16 A.M.
—————
W.T. of L.A.N. 11h 57m 04s A.M.
ANSWER.
By D.R.
Lat. 33° 10' N Lo. 70° 51' 20" W
By Observation
Lat. 33° 00' 26" N Lo. 70° 20' 36" W
Dev. at 8:30 A.M.
1° E
W.T. of L.A.N. 11h 57m 04s A.M.