i have a garmin gps w/internal antenna.(wish i had bought a unit w/external ant.,but too late now) i have limited space to mount it on my dash(gimble mount) i know the windshield frame will block signal.will the windshield cause alot of blockage? i can mount the unit approx,4" away from windshield.there will be clear sky view port and starboard and straight up.any help is appreciated,thanks.
shep
shep