Furuno DFF3D Multi-Beam Sonar f/NavNet TZtouch & TZtouch2

The Furuno DFF3D is a multi-beam sonar black box for NavNet TZtouch systems that need a wider view beneath and beside the boat. Its 165kHz transducer system covers a 120-degree side-to-side angle and supports Cross Section, 3D Sounder History, Triple Beam, and Side Scan modes. This is an external sonar module, so a compatible Furuno display and transducer are required.

The direct-down detection figure is listed at 650 feet, while side detection can reach beyond 1000 feet under the supplied specification. The different modes matter in practice: Cross Section helps inspect the water column, 3D History builds a picture of the bottom, and Side Scan extends the search area away from the hull. Ethernet links the DFF3D to NavNet TZtouch, TZtouch2, TZtouch3, or TZtouchXL systems.

Who Is This For?

This Furuno multi-beam sonar suits offshore fishing boats, cruisers, and NavNet users who want more coverage than a conventional narrow-beam sounder. It is not ideal for buyers without a compatible Furuno display or transducer, because the DFF3D is a network black box.

Warranty & Support

Furuno provides a 2-year standard warranty. The supplied specifications do not state warranty exclusions or service procedures.

The DFF3D is the Furuno choice when a boat needs broad multi-beam coverage and 3D history rather than a single narrow sonar cone. Its trade-off is the separate display and transducer installation. Choose it for a NavNet offshore system where Side Scan and 3D bottom views will be used regularly, not for a basic depth-only setup.