Navigation question (Projecting a waypoint w/GPS)
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Using a Garmin's Waypoint Projection feature, and projecting a
waypoint at 90 degrees, shouldn't my projected waypoint end up on the
same latitude as the original? And if not, why not?
For example, beginning at 30 degrees N latitude and 89 degrees W
longitude, I project a new waypoint at a distance of 10 miles with a
bearing of 90 degrees. As expected, my projected longitude changes to
a point further east. But for some reason, the projected latitude
ends up at a higher latitude than 30 degrees. In my example, the
projected latitude ends up as 30 degrees, 23.866 Minutes North.
I've tried using the same example on 3 different Garmins with the same
result. What am I missing?
It's the great circle conundrum. Charts aren't a fair representation of
the surface of the Earth.
--
Sir Gregory
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