Raymarine RealVision Transducer Extension Cable 3m. Each extension cable features a waterproof twist-lock connector at the MFD end and a compatible socket at the transducer end. For best performance Raymarine recommends using no more than two (2) extension cables in any given cable run. Specifications for Raymarine RealVision 3D Transducer Extension Cable: Manufacturer: Raymarine Color: Black GPS Model: Axiom RV Package Contents: Raymarine RealVision 3D Transducer Extension Cable Raymarine A80475: RealVision Transducer Extension 3m