If we had any traffic coppers left they should be pulling people up 24/7 for having large pratnavs stuck in the middle of the screen, glowing bright enough in the dark to create a real problem with vision beyond let alone the blind spots, quite how people get away without mishap with the blessed things stuck willy nilly is a mystery.

With most dash designs you should be able to find a spot that you can double side tape or glue a base to and then sucker the nav mount to that, hopefully avoiding the screen view completely or at worst only partially obscuring a section below the screen wiped part.