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It is an azimuth and I didn't know that word. Yes, they'll make a killing (best corporate practice) on new ones. Back in 2011, the direction of north changed slightly, Inuit way up north tracked this with how they tell the time of day, if I'm recalling correctly, it's using the shadows from snow drifts. If time has now recently shortened (still don't know where I heard about this), that really makes navigating a mess, lol.