I removed the solution to problem 2, it had two errors...
both related to sign of the deviation...
I don't know which one of the following is correct convention
DEV HDG(m) HDG(c)
-2 000 358
+2 090 092
-4 275 271
This gives solution (-1,3,-1)
DEV HDG(m) HDG(c)
+2 000 358
-2 090 092
+4 275 271
This gives solution (1,-3,1) and Dev = -2.4
So I deduce Dev = HDG(m)- HDG(c)
Last edited by jimmygill; 14th Feb 2010 at 05:00.