Can you disconnect my sat nav on my 2012 navara?
Yes. But not today's Sat. Nav.! In the gospel according Matthew they used the Sat. Nav. of the time - the star!! Matthew [2:9] When they had heard the king, they departed; and, lo, the star, which they saw in the east, went before them, till it came and stood over where the young child was. You might concur it was a Sat. Nav. with the utmost precision!!!.
By using GPS/Sat Nav available in the game, you can mark a waypoint Niko has to go to and a route will be marked in yellow on the screen map for him to follow. This route marking will automatically show up if a mission marker has already been put on the map. When Niko jacks a car and marks a route, a sat nav voice will also often come into play.
People tend to trust them too much, and stop thinking for themselves. Then if the sat nav fails for some reason(poor weather, overhanging trees, high buildings, old maps, temporarily rerouted roads or whatever) people get all upset and make a mess out of things. Also, trying to set a destination while driving is distracting and dangerous if it's the driver doing it.