TABLE 3. [Page 53 
Difference of Latitude and Departure for 18° (162°, 198°, 342°). 
Dep. } Dist. 
130.1] 481 
130. 4 
8 
-1 
4 
bil 
0 
3 
6 
9 
2 
5 
8 
~2 
-5 
-8 
1 
74 
etl 
.0 
3 
-6 
9 
-2 
6 
bY) 
22 
a) 
8 
Tn Plane Sailing. 
! Forconyerting Dep.into Diff. Long.and Diff. Long.into Dep. 
In Middle Latitude Sailing. 
For converting Dep. into Diff. Long. and Diff. Long.into Dep. 
In Mercator Sailing. uF 
For multiplication of numbers by sines and by cosines, or 
solution of plane right-angled triangles. 
