216 REPORT ON 



FORWARD BINNACLE COMPASS. 



_ _ 0.5643 + 17.000 At 4- 8.442 A 5- 6 4i C l 4- 0.924 Dt 4- 0.383 Et 

 o = 0.3228 + 8.442 A, 4- 8.310 Bt + 0.462 Ct 1.205 Dt 4-543 ^, 

 o = 4- 0.0861 5.641 A, + 0.462 Bt + 8.691 ^ + 3.900 Z>, 4-43 8 ^i 

 o = 0.0369 + A + * W C .') 

 o = o.oon + ., + BI Ct 

 Hence 



y4, = 0.0050 = I7'.I 

 Bt = 4- 0.0523 = 4- 2 59.8 



C, = 0.0307 = i 45-5 



A = + 0.0360 = + 2 3-7 



2?,= -|- 0.0027 = + o 9.3 



FORWARD RITCHIE COMPASS. 



o = 1.7570 + 17.000 A l 4- 8.442 Bt 5- 6 4i ^ 4- 0.924 Dt + 0.383 -", 

 o = 1.0582 + 8.44? A t 4- 8.310 Bt 4- 0.462 C\ 1.205 A 4-543 -#1 

 0=4- 0.3128 5.641 At + 0.462 A 4- 8.691 C, 4- 3.900 >, 4-438 #, 

 o = 0.0407 + A + i W -C, 1 ) 

 o = + 0.0013 + t -f A C, 



Hence 



A, = + 0.0564 = -f 3 14.0 



^, = + 0.0766 = -f 4 23.5 



C, = 0.0205 = i 10.4 



Z>, = + 0.0380 = -|- 2 10.5 



., = o.oooo = o o.o 



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

 cients of the After Ritchie Compass at Monte Video. 



o = 240'+ i.ooo At o.ooo J5 t -\- i. ooo C 1 , o.ooo Z), + i.ooo E^ 

 o = 570 + i.ooo A t + 0.195 A + -98i C, + 0.383 Z>, + 0.924 EI 

 o = 570 + i.ooo ^, + 0.383 ^ 4- 0.924 C, + 0.707 Z>, 4- 0.707 Et 

 o = 740 4- i.ooo ^, 4- 0.556 B t 4- 0.831 C, 4- 0.924 Z>, 4- 0.383 t 



o = 740 -(- i.ooo y4 t 4" 0.707 t 4- 0.707 C, 4- i.ooo Z>, o.ooo jff, 

 o = 740 4- i.ooo ^4, 4- 0.831 .5, 4- 0.556 C, 4- 0.924 Z>, 0.383 EI 

 o = 910 4- i.ooo At + 0.924 2?, 4- 0-383 C, + 0.707 Z>, 0.707 2?, 

 o = 900 -|- i.ooo At -\- 0.981 Bt 4- - I 95 C\ + 0-383 A 0.924 Et 

 o = 560 4- i.ooo ^, 4- i.ooo /?, o.ooo C, o.ooo >t i.ooo EI 

 o = 240 + i.ooo A t 4- 0.981 Bt 0.195 "i 0-383 A -9 2 4 EI 

 o = 230 4- i.ooo ^, 4- 0.924 Bt 0.383 C, 0.707 Z>, 0.707 EI 

 o = 60 4- i.ooo At 4- 0.831 B t 0.556 C, 0.924 Dt 0.383 EI 

 o = 4- 2 7 + i.ooo At -\- 0.707 Bt 0.707 C, i.ooo Z>, o.ooo EI 

 = 4- I0 4- i-ooo At + 0.556 Bt 0.831 C, 0.924 Z>, 4- 0.383 Et 

 o = 240 + i.ooo At + 0.383 Bt 0.924 C, 0.707 Z>, + 0.707 Et 

 o = 240 4- i.ooo yf, 4- 0.195 B\ -98i C, 0.383 Dt + 0.924 2?, 

 o = 240 4" i-ooo A t o.ooo /?, i.ooo C, o.ooo /?, 4- i.ooo Et 

 o = - 410 4- i.ooo At 0.195 A 0.981 C, 4- 0.383 Dt 4- 0.924 .fi", 

 o = 410 + i.ooo At 0.383 Bt 0.924 C, + 0.707 Z>, 4- 0.707 EI 

 o = 240 + i.ooo .4, 0.556 Bt 0.831 C, 4- 0.924 Z>, + 0.383 Et 

 o = 240 + i.ooo ^, 0.707 B t 0.707 C, + i.ooo Dt o.ooo /?, 

 o = 570 4- i.ooo A t 0.831 2f, 0.556 C, + 0.924 Dt 0.383 2?, 



