PROBLEMS 73 
Case I—Problem 5.—The U. 8. 8. Texas is making passage from San Diego to 
Valparaiso. During the forenoon of June 25, 1928, while in D. R. position 
latitude 30° 05/8 S., longitude 74° 34/5 W., the navigator observed the sun’s 
lower limb as follows: W. 8» 15™ 26s; C-W. 54 07™ 12s; chronometer fast 7™ 428; 
corrected observed altitude 14° 07/5. Required the line of position. 
h m 8 
J ag ee 3 ily BAS 
CAWis se ee eee 5 Of WP 
1B} 22) BS 
(Gis (Ce eae (—) GY @@ 
Guo 25) Juness 13° 14756 
Hgwohabe soc 3 (—) Ze 258 5 
GAC ois Yea Ree UR 12 SOL & 
Subunacheea sees 12 
(COMET ANS = 8s ee 1 1 BOL WW 
JNTROs Se aie 18° 07. 6’ W. 
Assumed long_(—) 74 07.6’ W. 
Tins El lgees eee Oe eer 56 KE. 
(22 ales eam shales 232) 23.8yNe 
Ass. lat_ 30° b 44° 05/1 S. A 15734 C 144 Li Doge 
d+b 20° 41/3 B 45188 D 423 
h, 14° 14/0 A+B 60922 C+D 567 Lh (Ames 
he 14° 0775 
aes (Z) $12893 E 
a 615 (away) 
Case I—Problem 6.—The U. 8. 8. Stewart is making passage from Hainan, 
China, to Manila. During the afternoon of. May 18, 1928, while in position by 
D. R. latitude 17° 01/3 N., longitude 116° 34’ E., the sun’s lower limb was 
observed as follows: W. 45 00™ 10*; C—W. 35 45™ 325; chronometer slow 14™ 18s; 
corrected observed altitude, 35° 38/9; sun bore 281° per gyro compass. Required 
the line of position and the error of the gyro compass. 
og he m 8 
VV a SR cs 4 00 10 
TAN Se ey aes aces OM OUD, 
~ 45 42 
CaiC ee ae (+) £4414 18 
G. C. T.18 May... 8 00 00 
Eq. (0) ie A an a +3 43.1 
Cp At IP 8 03 43.1 (add 24 hrs.) 
BUbtraACb a4. eee 12 
GraeerAC 22k oa 20 03 43.1 W. 
PAT Cee ne oa a 300° 55. 8’ W. 
Assumed long_(-++) 116 04. 2’ E. 
Medes PAG 2h., SS oa yes 417° W. 
(Reject) =. ce 360° 
Pesaro eee et 57 W. (illustrates Note 13(d)) 
