(06-22-2018, 03:33 AM)BigBill Wrote: When you plot your TOWARD or AWAY distance, do you account for the change in distance between degrees of longitude?
Darn-it, Bigbill... you just made me doubt my own work - great question. I have been using great circle distance and use latitude to ascertain distance. (Using distance from right or left margin.) In other words I use full nautical miles without compensation for divergence (or convergence) of latitude. But then again I live at 10 degrees north and do all my observations here where there is not much difference between true Nautical miles and max seconds of longitude in meters which vary with latitude..