In Nevada, when programming waypoints into the PVI-800 for the first time in ages. Using the ABRIS to get coordinates for my waypoints, I input them in to the PVI-800 only to find that I was being told that I was some tens of kilometres off of my actual position.
Cross-referencing my current coordinates as listed on the ABRIS, the PVI-800 SELF COORD and INIT POS, the F10 map, and my actual position on Google Earth, only the ABRIS was incorrect, consistently telling me I was about 1°1' west of my actual position.
Issue is present across missions, both singleplayer and multiplayer.
Issue is present in Nevada, is NOT present in the Caucasus.
Edit: Attached map visualisation.