170 GREAT CIRCLE SAILING. appendix. 



" GREAT CIRCLE SAILING. 



" Let co-latitude of Lizard = 13; co-lat. of Funchal = y; 

 difference of longitude = A ; difference of co -latitude = u ; 

 bearing from Lizard = * ; bearing from Funcbal = <p ; dis- 

 tance required = a. 



" TO FIND THE DISTANCE. 



/3 = 40° 02' sine .... 9-808368 



y = 57 22 sine .... 9-925384 



A =11 43 log sine sq. . . 8-017789 



Constant log . 6-301030 



Natural number 11287 = 4-052571 log. 

 fi. = 17° 20' ver. sine 045412 



056699 versed sine 19° 23' 

 X 60 



Miles 1163 = x 



"TO FIND THE BEARINGS. 



x = 19° 23' sine 9-520990 sine 9-520990 



A =11 43 sine 9-307650 sine 9-307650 



y = 57 22 sine 9-925384 . /J = 40° 02' sine 9-808368 



31° 01' 02"=9-712044 9-595028 



180 23° 10' 37" = <p 



148 58 58 = X 



