Nav Plog
Hiya,
When planning a route on the half mil chart from say town A to town B I draw a straight line and measure the distance. To get the true track I mark the middle of A - B and align my protratctor in the middle and read off the heading which works fine. To mark on my chart a 10 degree off track line I use the same meathod of aligning the protractor in the middle of true track and minus or add 10 degrees and mark the fan line originating from B and extending to A. Now when I move the protractor directly over B to double check the heading or give the radial from B which should be the same as track true this works fine but when I check the 10 degree off track line I only get a radial of about 7 degrees. This is the meathod ive used throughout my PPL and beyond. Am I doing it correctly????? The difference between measuring the heading half way along track and over the destination confuses me and I can understand why the fan line heading differs.
Thanks in adavnce for your help