216 



REPORT ON 



Hence 



Forward Binnacle Compass. 



o — — 0.5643 + 17.000 A x + 8.442 B x — 5.641 C x -f- 0.924 D x + 0.383 E x 

 o = — 0.3228 + 8.442 A x + 8.310 B x + 0.462 C\ — 1.205 Z>! — - 4.543 E x 

 o = + 0.0861 — 5.641 A 1 + 0.462 B x + 8.691 C x + 3.900 Z> x — 4-438 E x 

 o = — 0.0369 + D x + 1 (2?^ — C7) 

 o = — 0.0011 -\- E x -\- B x C x 



^4j = — 0.0050 

 A = + 0.0523 

 C x = — 0.0307 



Z?! = -f- O.O360 



E x z= 4- 0.0027 



+ 2 



I 



+ 2 



+ 



1 7'. i 



59-8 



45-5 



3-7 



9-3 



Hence 



Forward Ritchie Compass. 



o = — 1-757° + 17-000 A x + 8.442 B x — 5.641 C x + 0.924 D x + 0.383 ^ 

 o = — 1.0582 -f 8.442 A x + 8.310 B x + 0.462 C x — 1.205 Z>! — 4.543 E x 

 o = + 0.3128 — 5.641 A x + 0.462 ^ 4- 8.691 C x 4- 3.900 Z>j — 4.438 E x 

 o = _ 0.0407 4- 2> t + i (B* —C*) 

 = 4- 0.0013 + E i + B x C x 



A x = -\- 0.0564 = 4-3° 

 B x = 4- 0.0766 = 4-4 

 C, — — 0.0205 — — J 

 Z>, = 4- 0.0380 = 4" 2 

 E. = 0.0000 = o 



14.0 



23-5 



10.4 



10.5 



0.0 



The following are the equations of condition for the determination of the coeffi- 

 cients of the After Ritchie Compass at Monte Video. 



= 



— 240' + 



[.000 A x 



0.000 B x 



+ 1. 000 C x 0.000 D x + 1. 000 E x 



= 



— S7o + 



1. 000 A 



4- 0.195 A 



+ 0.981 C x + 0.383 Z>, + 0.924 E x 



= 



— S7o + 



1. 000 A x 



+ 0.383 B x 



+ 0.924 C, + 0.707 D x + 0.707 E x 



= 



— 740 + 



1. 000 A, 



-4- 0.556 B x 



+ 0.831 C, + 0.924 D x + 0.383 ^ 



= 



— 740 + 



1. 000 A x 



4- 0.707 B x 



+ 0.707 C x + 1. 000 D x 0.000 .Z?, 



= 



— 740 + 



1. 000 A t 



4" 0.831 B x 



+ -556 C x + 0.924 Z^ — 0.383 E x 



= 



— 910 + 



t.000 A t 



4- 0.924^ 



+ 0-383 C, + 0.707 D x — 0.707 E x 



= 



— 900 + 



1. 000 A x 



4- 0.981 B x 



+ o-i95 C, + 0.383 D x — 0.924 ^ 



= 



— 560 + 



[.000 A t 



+ 1. 000 B x 



0.000 C x 0.000 jDj — 1. 000 E x 



= 



— 240 + 



c.ooo A x 



4- 0.981 B, 



— 0.195 c; — 0.383 z?, — 0.924 i?, 



= 



— 230 + 



t.ooo A x 



4- 0.924^ 



— 0-383 C, — 0.707 Z>! — 0.707 E x 



= 



— 60 + 



.000 A x 



4- 0.831 B t 



— 0.556 C x — 0.924 Z>, — 0.383 E x 



= 



4- 270 + 



.000 A x 



4- 0.707^ 



— 0.707 C\ — 1. 000 D x 0.000 E x 



= 



4- 100 4- j 



.000 A x 



+ 0.556 B x 



— 0.831 C x — 0.924 D x + 0.383 .£, 



= 



— 240 + 



.000 A x 



+ 0.383 B x 



— 0.924 C, — 0.707 Z\ + 0.707 E x 



= 



— 240 4- ] 



.000 A x 



+ 0.195 -#, 



— 0.981 C x — 0.383 D x + 0.924 E x 



= 



— 240 4- j 



.000 A t 



0.000 B x 



— 1. 000 C x 0.000 D x + 1. 000 E x 



= 



— 410 4- i 



.000 A , 



— 0.195.^ 



— 0.981 C x + 0.383 D x + 0.924 E x 



= 



— 410 + ) 



.000 A x 



— 0-383 A 



— 0.924 C x + 0.707 D x + 0.707 E x 



= 



— 240 4- 1 



.000 A x 



- 0.556 A 



— 0-831 C x + 0.924 Z>, + 0.383 E x 



— 



— 240 4- 1 



.000 A x 



— 0.707 B x 



— 0.707 Cj + 1. 000 D x 0.000 ^ 



= 



— 570 + 1 



.000 A x 



— 0.831 B x 



— o-556 C x + 0.924 A — 0.383 E x 



