Garmin Gcv 10 Black Box Sonar SideVu and DownVu with CHIRP scanning sonar to the echo MAP 70 series to displaying ultra-clear sonar picture of structure and fish that pass below and to the sides of the boat. With 3 network ports, optional map scan be shared with multiple Garmin units. SideVu and DownVu with CHIRP scanning sonar to the echo MAP 70 series to displaying ultra-clear sonar picture of structure and fish that pass below and to the sides of the boat. With 3 network ports, optional map scan be shared with multiple Garmin units. SideVu and DownVu with CHIRP scanning sonar to the echo MAP 70 series to displaying ultra-clear sonar picture of structure and fish that pass below and to the sides of the boat. With 3 network ports, optional map scan be shared with multiple Garmin units.