Raymarine's exclusive line of DownVision transducers pair a conical CHIRP fishfinding element with a wide beam DownVision element. The result is an unrivaled level of subsurface visibility. Compatible with a68, a78, a98 & a128 multifunction displays. Max Depth (Ft): DV:600 / FF:900Frequency (KHz): DownVision / CHIRP FishfinderBeam Width (L/H): 25°/60°Records: Depth / TemperatureApproved Hull Material: Fiberglass / Metal / WoodSupported Deadrise / Transom Angles: 0-25° Deadrise