71° 15´ S, IE - 47´, HE 25 ft. CT 3h 34m 15s P.M. Required latitude of ship.
 | 71° 15' 00 S | IE | - 47' |
| Corr. | - 36 24 | HE | + 10 36 |
| —————— | ——— | ||
 | 70° 38' 36" S | Corr. | - 36' 24" |
| - | 90 00 00 | ||
| —————— | |||
| ZD | 19° 21' 24" N | ||
| Dec. | 23 17 15 N | (G.M.T. June 15 3h 34m 15s) | |
| —————— | |||
| Lat. | 42° 38' 39" N | ||
| —————— | |||
Assign for Night Work or to be worked in class room such examples as the following:
1. June 1st, 1919.
33° 50' 00" S. G.M.T. 8h 55m 44s. HE 20 ft. IE + 4' 3". Required latitude in at noon.
2. April 2nd, 1919.
12° 44' 30" N. CT was 2d 5h 14m 39s A.M., which was 1m 40s slow on March 1st (same CT) and 4m 29s fast on March 15th (same CT). IE - 2' 20". HE 22 ft. Required latitude in at noon.