Raymarine's RV-200 Bronze All-In-One Thru-Hull Transducer is  designed for inboard and outboard powerboats. The RV-200 lets you easily  identify structures and locate fish with the life-like clarity of  RealVision 3D™ sonar.
 The RV-200 is a 4-channel, Wide Spectrum  CHIRP transducer with DownVision™, SideVision™, high frequency CHIRP  fish targeting and RealVision 3D™ sonar inside. The transducer has a  built-in attitude and heading reference system (AHRS) that stabilizes  the sonar imagery, automatically compensating for vessel motion. You'll  enjoy crystal-clear imagery in waves, swells, and while maneuvering. The  RV-200 also has a built-in fast response water temperature sensor for  quick, accurate readings.
 The RV-200 features a rugged  cast-bronze through hull body suitable for fiberglass or wooden hulls.  The RealVision 3D™ transducer elements are arranged with a 0° offset for  boats with flat bottoms. The low-profile design slips effortlessly  through the water without causing drag or cavitation. The near-flush  RV-200 works great on trailered boats too, and with no fairing block to  cut, installation is a breeze.