Raymarine RV-312S RealVision 3D Plastic Thru-Hull Transducer Starboard 12 Degree (2M Cable)Raymarines RV 300 Plastic All In One Through Hull Transducer is designed for inboard and outboard powerboats. The RV 300 lets you easily identify structures and locate fish with the life like clarity of RealVision 3D sonar. The RV 300 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)