Furuno DFF3D Multibeam Sonar
$2,095, plus $1,900 for through-hull transducer; furunousa.com
Furuno’s DFF3D multibeam sonar is a network sensor that adds side-scanning functionality to its NavNet TZTouch and TZTouch2 multifunction displays. Using a 14-inch-long, multibeam transducer, the DFF3D offers side-scanning range to 650 feet while downscanning to depths better than 1,000 feet, according to Furuno. The transducer has a built-in motion sensor that keeps the image stable in rough conditions. The company’s proprietary signal processing produces images to help the user find and track fish. Four display modes include triple/single beam sounder, which allows traditional sonar views, or separate the left, right and center images simultaneously. Meanwhile, sidescan allows the user a high-definition image of structure on either side of the boat. The 3D sounder history lets the user parse a detailed image of the seafloor to discern targets and optimal fishing structure or anchoring locations, while cross section displays a real-time echo of the water column out 120 degrees to port and starboard. The various modes allow the user the flexibility to tailor the sonar view to the task at hand. With three-dimensional fish targets displayed in relation to the boat in real time, the DFF3D shares information that may help improve catch rates.