Quote Originally Posted by Bushwalker8 View Post
Garmin clearly understands their datum transformation is initially simplistic, and that their device isn't tracking it's subsequent drift over time.
BTW if you have any information about Garmin's "datum transformation" and stuff, don't hesitate to share this information here. That'll be interesting because in many Garmin devices the user can define custom grid using different projection templates (Mercators, Lambert, etc.). Unfortunately, it's not documented at all. What sort of math is implemented? What are the limitations, known defects and other imperfections? Garmin says nothing. So it'll be nice if anyone can shed some light on that.