PROBLEMS 71 
decrees Ce 2IAOR NE 
fr. Table I_. 633° 02/1 S. A 21159 C 103 Z! 3925 
d+630 41.1 B 29216 D 227 
h, 18° 16/2 A+B 50375 | C+D 330 Z” 65.0 
h, 18° 16/5 _ 
——_-- (Z) S. 104°5 W. 
a 0/3 (towards) 
Lay off from the assumed position latitude 31°, longitude 49° 37:7 the bearing 
(Z) S 104°5 W., and, at a distance a=0!3 towards the body on the bearing line, 
draw a line at right angles to it. This is the required line of position. 
Important.—It must not be forgotten that the bearing of the body and the 
intercept must be laid off from the assumed position and not the dead reckoning 
position. 
Case I (L. H. A. less than 90°; d+6 greater than 90°)—Problem 2.—The 
U. 8. 8. Corry is making passage from San Diego to Honolulu. At evening 
twilight on December 15, 1928, in D. R. position latitude 24° 30/9 N., longitude 
147° 149 W., the navigator observed the star ‘‘Deneb” as follows: W. 54 41™ 
13°; C-W. 9 51™ 235; chronometer slow 8™ 22%; observed altitude 49° 49/5. 
Required the line of position. 
h m 8 
\ ee ee eee 5 41 18 
@aWis sess e355 9 51 23 
5 o2n oo 
(Ch OS. eee (+) 8 22 
G. C. T. 16 Dec. 3 40 58 
Re Ae M..©2.2.. i Bi BVA 7 
ih 100 a eee 0 36.3 
Gari goby 9 19 07.0. (Now add 24 hrs. to G. 8S. T.; illustrates 
Lie gS ae 20 38 58.4 note 1.) 
(Gils ay eee 12 40 08.6 
PTR) el RN he 190° 02/2 W. 
Assumed A__~_-- (—) 147° 02!2 W. 
by 1 Geer Neer ee 43° W. 
t_---.___._ 43°)dec. 45° 01/6 N. 
Ass. lat__ 25°Jb 57° 28°7 N. A 10453 C 209 Z’ 68°5 
d+b 102° 30/3 B 1043 D 9346 
h. 50° 07/4 A+B 11496 | C+D 9555 Z’’ (—) 19°8 
h, 49° 49/5 : ; 
ae (Z) N. 48°7 (W.) 
a 17/9 (away) 
(In this problem d+b exceeds 90°; therefore, take angle 102° from bottom of 
page 64 of Table II and 30’.3 from right-hand column at side. The resultant 
Z’’ is given a negative sign. This illustrates note 14.) 
201432°—40——6 
