Raymarine RV-300 Plastic All-In-One 0 Thru-Hull Transducer [A80470]RV 300 Plastic All In One 0 Thru Hull Transducer Raymarines RV 300 Plastic All In One Thru 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. For a deadrise of 0 5 degrees. The RV 300 is a 4 channel, Wide Spectrum CHIRP transducer with DownVision, SideVision, high frequency CHIRP fish targeting and RealVision 3D sonar inside.