FURUNO REAL-TIME SONAR
Furuno offers a version of live sonar for recreational fishing in its DFF3D system, but this function differs significantly from the Garmin LiveScope and Lowrance Livesight. The cross-section real-time sonar — one of many functions in the system — sweeps side to side rather than fore and aft, and it operates at 165 khz for a range of 400 to 500 feet. Networked with Furuno’s Navnet Tztouch and Tztouch2 MFDS, the DFF-3D transducer sweeps 120 degrees in 3-degree increments with an 11-degree fore-and-aft beam width. A rate and motion sensor compensates for boat movements to stabilize the image. The cross-section real-time sonar function is designed for finding fish directly below and on both sides of the boat. Furuno’s DFF-3D, including transducer and black-box module, sells for $1,695.