12 USE OF THE TABLES 
Case I—Problem 3 —The U. 8.8. Idaho is making passage from Rio de Janeiro 
to Cape Town. During evening twilight on September 29, 1928, the navigator 
observes the star ‘Rasalhague” as follows: W. 6 38™ 15s; C-W. 115 58™ 45s; 
chronometer slow 1™ 048; corrected altitude 40° 33/1. Position by D. R. at time of 
sight was latitude 30° 57’ S., longitude 0° 08'6 E. Required the line of position. 
h 
iis ee ee ee 6 88 15 
Weer enc ane te 11 58 45 
C.F 6 37 00 
Cree See ae (+) 1 04 z 
G:C. T: 29 Sept. == 18 38 04 or, G. C. T. 29 Sept. 18 38 04 
RAM O.22e- sas. 030 1.3 ; 
Ci 65 1 a 3 3 G. H. A. 29 Sept. 104° 36/3 
—-- Corr. 185 38™ 280 15.9.. 
Ce. oe oe eee 19 11 09.0 Corr. 48 1.0 
RA? Eh HOE 17 31 36.3 ike 
G. H. A. 24 53.2 W. 
G 0H. A senses es 1 39 32.7 W Assumed long. 0 6.8 E. 
Ro) Are. stestioie Sse 24° 53/2 W. a 
Assumed long___.(+) 0° 68 E Ti. As 25° 00.0 W. 
I SEls FAv tee seta es 25° O10 W. 
foo pts ots, 25° \dee. 12° 36/8 N. oe 
Ass. lat__- Bile of b 56° 27/4 S. A 3054 C 441 sty Spam? lose) 
d+b 438° 50/6 B 15946 ID alee 
he 40° 13/0 A+B 19000 C+D 458 Li Ors 
h,. 40° 33/1 
sae ESTA (Z) 8.147°3. W 
a 20/1 (towards) “ 
Case I—Problem 4.—A seaplane is making passage from New York to Ponta del 
Gada, Azores. . During evening twilight on June 24, 1928, while.in position by 
D. R. latitude 38° 14°8 N., longitude 31° 4875.W., the navigator observed the 
moon’s lower limb as follows: W. 7» 51™ 008; C—W. ‘Oh 08™ 29s; chronometer fast 
8™= 315; corrected altitude 48° 39/1. Required the line of pasties; 
h m 5 
Wie ee eee a 51 00 
CW ee ee 2 08 29 
9 59 29 
(Oi Ceti ht , eo ee (+) 8 831 
G. C. T. 24 June__ 21: 50 58 
RA. Me Os. -2— 180 35,5 
of Dt Ul Lc a a 3 35.4 
Gos. bes se Se 16 02 08.9 
A ee Se ee ‘12 17 -23. 0. 
Gil Asti: 5 Gee. 3 44 45.9 W.: 
BO BA CS axe 2 Se = 56° .11/ 5. -W. 
Assumed long__-__- (—)31° 1125 W. 
Dp A eee Bee 25° OfO W. 
en ee eee 5 | SoIesOmN 
Ass. lat. 38°fb 49° 14/2 N. A 2553 CG. 478 Z! 7420 
d+b 52° 36/8 B 9988 D 9883 
pew Sonate? A+B 12541 C+D 361 Z’’ 66.5 
h, 48° 39/1 
eas ae (Z) N 140°5 W. 
a 7:9 (towards) 
