Garmin Accessory GPSMAP 1242xsv US+Canada+Bahamas g2 Lakevu HD w/GT52TM 010-01741-21. A GT52-TM transducer is included for Garmin CHIRP sonar and CHIRP ClearVu and CHIRP SideVu scanning sonars (also available without transducer). Theres also built-in...