Designed for inboard or outboard boats, the RV-212 Bronze Thru-Hull  Transducer System lets you easily identify structures and locate fish  with the life-like clarity of RealVision 3D™ sonar.
 The RV-212  system is a 4-channel, Wide Spectrum CHIRP transducer system with  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-212 system also has a built-in fast response water temperature sensor  for quick, accurate readings.
 Raymarine's RV-212 Bronze  Thru-Hull Transducer system pack contains a pair of RealVision 3D  transducers with internal offset to accommodate hull deadrise angles  from 1° to 12°. This completely eliminates the need for fairing blocks.  The low-profile design slips effortlessly through the water without  causing drag or cavitation. The near-flush RV-212 system works great on  trailered boats too.
 The RV-212 system features rugged  cast-bronze thru-hull bodies suitable for fiberglass or wooden hulls.  One transducer transmits and receives to port and downwards, the other  to starboard and downwards, ensuring a full 180° of underwater coverage  even on boats with 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).