Ship Deviation-Coefficients 



87 



values of Aa, Da, and Ea, which are constant according to theory, will also be found in this 



table. The parameters - (— = — )> -, -, -, -i — > and — i derived from the values of x, y, 



x', and y', Aa, Da, and Ea, are included in the table merely for the purpose of comparing 

 their values as determined from the different groups, or for comparing them with those of 

 other ships. 



The computation of the deviations is greatly expedited by a tabular arrangement in 

 which all the values of any columns may be entered at one time, if desired. For specimen 

 computation, see page 92. 



Inclination. — Equations (14) to (18), page 79, are simphfied by expressing the quantities 

 in degrees and by making 



c-g 

 2 sin 1° 



h+f 

 2 sin 1° 

 Then we have 



x = 



y =, 



y= - 



z = — 



z = 



^« = o ■ ^o sin 27 = 

 2 sin 1 



c + g 

 2 sin 1° 



Q ^_^ 



2 sin 1° /sinr 



X-^•-l 



2 sin 1° 



a — e 



2 sin r 



„ „, , sin 2/ 



5« = X + 2/ cos 2/ + 3 „ 



^ , , ^.^ . ,sin 2/ 



C, = x' + y cos 2/ + z' —^ 



D, = x" sin 27 



E, = x'" sin 27 



sin 27- 



R 1 



sin 1° 77 



h-f 

 ' jL sin 1° 



_d±h_ 

 ~ 4 sin r 



cos^ 7 



(32) 

 (33) 



(34) 



(35) 

 (36) 



