m the greater and the
result will be the latitude in, named N or S after the greater. Example:

At sea June 15th, observed altitude of (_) 71 deg. 15' S, IE--47', HE 25 ft.
CT 3h--34m--15s P.M. Required latitude of ship.

(_) 71 deg. 15' 00 S IE -- 47'
Corr. -- 36 24 HE + 10 36
------------------- ---------
-(-)- 70 deg. 38' 36" S Corr. -- 36' 24"
-- 90 00 00
-------------------
ZD 19 deg. 21' 24" N
Dec. 23 17 15 N (G.M.T. June 15--3h 34m 15s)
-------------------
Lat. 42 deg. 38' 39" N
-------------------

Assign for Night Work or to be worked in class room such examples as the
following:

1. June 1st, 1919. (_) 33 deg. 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 deg. 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.

Assign for Night Work reading also, the following Articles in Bowditch:
344 and 223.

THURSDAY LECTURE

AZIMUTHS OF THE SUN

This is a peculiar word to spell and pronounce but its definition is
really very simple. Put in your Note-Book:

The azimuth of a heavenly body is the angle at the zenith of the
observer formed by the observer's meridian and a line drawn to the
center of the body observed. Azimuths are named from the latitude in and
toward the E in the A.M. and from the latitude in and toward the W in
the P.M.

All this definition means is that, no matter where you are in N
latitude, for instance, if you face N, the azimuth of the sun will be
the true bearing of the sun from you. The same holds true for moon, star
or planet, but in this lecture we will say nothing of the star azimuths
for, in some other respects, they are found somewhat differently from
the sun azimuths. Put this in your Note-Book:

To find an azimuth of the sun: Note the time of taking the azimuth by
chronometer. Apply chronometer correction, if any, to get the G.M.T.
Convert G.M.T. into G.A.T. by applying the equation of time. Convert
G.A.T. into L.A.T. by applying the longitude in time. The result is
L.A.T. or S.H.A. With the correct L.A.T., latitude and declination,
enter the azimuth tables to get the sun's true bearing, i.e., its
azimuth.