By deduction, this is written for airplanes equipped with drift meters. Think about the wind side of a flight computer. If you have a heading (from compass/DG) and crab angle (from drift meter), you can draw a line over the heading, for the corresponding course (which is in the middle). Do this for a second heading (and its drift), now you have 2 lines that make a cross, which is the wind.
Last edited by Vessbot; 25th February 2023 at 21:14.