I'm shit at this and headed into Istanbul tomorrow with a garmin Montana 600 I ordered on the fly in Bucharest. I've got some silky smooth maps loaded on the device but it won't use the maps to navigate me to a wayloint, POI, etc. Just a straight line from my current location to Istanbul, Sinbad Hostel. Any guidance would be much appreciated. p.s. Yeah I slipped a guidance in there, I'm without shame.