I use the 1 in 60 , the only thing I will add is that I calculate the track miles from the initial intercept,IE 10 mile arc Airspeed 210, start my turn at a tad over 12 miles, and finish the calc when I roll out on the exit from the ARC,just mentioning not nitt picking.
What ever you are comfortable with and works?.
BUT through the smell of my HOPS, a QUESTION.
PYTHAGORAS::::
We agree 1 in 60 around a 10 mile arc is 60 miles.
I just worked it out with old pythagoras, and there is an error in the 10 mile arc of 2.8 miles, and a 15 mile arc of 4.2 miles , etc etc, could someone tell me why?.
Cheer's.
Crack.