Raymarine Pack of RV-312 RealVision 3D Plastic Through Hull Transducers Port And Starboard 12Deg 2x2m Y-cable and 8m Extension Cable. The RV-312 system is a 4-channel Wide Spectrum CHIRP transducer system w/ DownVision SideVision high frequency CHIRP fish targeting and RealVision 3D sonar inside. The transducer system 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-312 system also has a built-in fast response water temperature sensor for quick accurate readings. Raymarine's RV-312 Plastic Through Hull Transducer system pack contains a pair of RealVision 3D transducers w/ internal offset to accommodate hull deadrise angles from 1deg. to 12deg. This completely eliminates the need for fairing blocks. The low-profile design slips effortlessly through the water w/out causing drag or cavitation. The near-flush RV-312 system works great on trailered boats too. The RV-312 system features rugged plastic through hull bodies suitable for fiberglass steel or aluminum hulls. One transducer transmits and receives to port and downwards the other to starboard and downwards ensuring a full 180deg. of underwater coverage even on boats w/ deep keels or other underwater protrusions. Each transducer features a 2-meter pigtail joining y-cable and 8-meter extension cable resulting in an overall cable length of 10 meters (33 feet.) Specifications for Raymarine Pack of RV-312 RealVision 3D Plastic Through Hull Transducers Port And Starboard 12Deg.: Manufacturer: Raymarine Color: Black Beam Angle: 12 degrees Hull Type: Thru-Hull Package Contents: Raymarine Pack of RV-312 RealVision 3D Plastic Through Hull Transducers Port And Starboard 12Deg. Raymarine T70320: Pack of RV-312 RealVision 3D Plastic Through Hull Transducers Port And Starboard 12Deg 2x2m Y-cable and 8m Extension Cable