218 



REPORT ON 



Hence 



AFTER BINNACLE COMPASS. 



o = + 0.8029 + 14-000 A, 8.825 l + 4-717 Ci 1.631 A 1. 

 o = _ 0.5291 - 8.825 A, + 7-545 A - 0.816 C, + 0.934 A + 4. 

 o = + 0.4497 + 4-7'7 A - Sl6 B * + 6>4s6 C ' ~~ 4 ' 554 DI + 3 ' 

 o = 0.0385 4 A + i W C '') 

 o = + 0.0018 + t + B, C, 4 0.0047 (A 1 C,') 



AI = 0.0208 = i n'-4 

 ^,= + 0.0393 = + 2 i5- 



C, = - 0.0222= - I l6.2 

 A = 4- 0.0380 = 4 2 10-5 



E t = 0.0010:= o 3.3 

 AFTER RITCHIE COMPASS. 



090 E l 

 272 E, 



Hence 



Hence 



o = + 0.0989 + 14.000 A, 8.825 

 o = 0.1171 8.825 A t 4- 7.545 

 o = + 0.2238 + 4-717 A, 0.816 



o = 0.0340 + A + i W C, 1 

 o = + 0.0008 + ., + .ff, C, 



, + 4.717 C, 1.631 /? 1.090 



, 0.816 C, + 0.934 Z>, + 4.272 



I + 6.456 C, 4-554 A + 3-784 



+ 3 3S'-5 

 B^ = + 0.0778 = + 4 27-3 

 C, = 0.0497= 2 51.0 



A= + 0.0322 = 4 i 50.7 



t = 4 0.0031 = + 10.6 



FORWARD ALIDADE COMPASS. 



o = 0.4683 + 14.000 A l 8.825 j9, + 4.717 C, 1.631 A I -9 -^i 

 o = 4-0.4115 8.825.4, 4- 7.545 .#, 0.816 C l 4-0.934 A 4-4.272^, 



= 40.1082 4 4.717^, 0.816^?, + 6.456 C, 4-554 A + 3-784^, 

 o = 0.0235 + A + 

 o = 0.0007 + -^i 



A t = 4 0.0200 = + i 8'.8 



^, =: - 0.0361 = - 2 4. 1 



C, =: - O.OI97 = - I 7-6 



A= + 0.0230 = -\- 1 19.2 



. = O.OOOO = O O.O 



FORWARD BINNACLE COMPASS. 



0=4 0.3956 4 14.000 A l 8.825 

 0=4 0.0125 8.825 A, 4 7.545 

 o = + 0.7497 4 4.717 /*, 0.816 

 o = - 0.0369 + A + i W C," 

 o = o.oon + EI 4 #, C, 



I + 4.717 C, 1.631 A I -9 

 I 0.816 C, 4 0.934 A + 4-272 

 ^ 4- 6.456 C, 4-554 A + 3- 784 



Hence 



^, = 0.0298 = i 



5, = 0.0478 = 2 



C, = 0.0719 = 4 



A = + 0.0384 =42 



E l = 0.0023 



42'.6 

 44-3 

 7-3 

 ii. 8 



7-9 



