Join Date: Aug 2016
Location: Eastern Ontario
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Re: Path used to compute bearing and distance by GPS?
I see more value in understanding how the math/navigation works. Understand the trigonometry and the software is just a fancy calculator with the hardware providing a visually appealing, easy to understand display.
With higher end chart plotters, you select which read out you want, rhumb line or great circle and the chartplotter performs the calculation for you.
Most people find great circles difficult to steer so the default is generally rhumb line. If you are going longer distance, you switch to great circle and find a way to steer the great circle, traditionally it was done by squaring off the curve, but I am guessing newer autopilts can do it on their own.
The software/hardware will constantly change, but the fundamental math and navigation principles don't.
Last edited by Arcb; 11-13-2019 at 04:38 PM.