True Heading = 070 degrees
True Track = 061 degrees
True Air Speed = 120 knots
Ground Speed = 118 knots
what is the wind variation?
these are the steps I am taking to calculate the wind variation:
1 - put the true heading on top - the true heading is 070 degrees
2 - put the true air speed inside the little circle - the true air speed is 120 knots
3 - mark the drift ( true heading - true track) = (070 - 061) = 9 degrees on that line
4 - draw down to the ground speed (118 knots)
5 - bring the little blue circle back to zero
6 - rotate the disk so that the cross is on the central line
there I can see that the wind comes from 151 degrees at 19 knots.
will this always be correct?
Could I have calculated it through a formula (without using the computer)?