Furuno DFF3 Black Box Network Sounder

Furuno DFF3 is a network sounder featuring Furuno Digital Filter (FDF) Technology designed for use with NavNet series devices. This digital Network Sounder can turn any NavNet display into a powerful, dual-frequency digital fish finder.

The compact network sounder unit connects directly to a NavNet display or an Ethernet hub with a single Ethernet cable. If it is connected to an Ethernet hub that has multiple displays attached, each of those displays will have access to the Network Sounder.

Furuno DFF3
Furuno Dff3


  • Utilizes FDF (Furuno Digital Filter) signal processing technology
  • Furuno Free Synthesizer (FFS) allows for selectable operating frequency of 28 to 200 kHz
  • Dual frequency, alternate transmission
  • Compatible with Airmar transducer ID technology
  • Heaving compensation with use of the SC-30/50/110
  • Variable Transmission Rate for different depth ranges allows for more detailed observation of bottom
  • Dedicated 6-pin temperature sensor port available
  • WAGO connection for ease of installation
DFF3 Screenshot
DFF3 Screen

Furuno Digital Filter Fish Finder

Furuno Digital Filter (FDF™) Fish Finders feature advanced filtering capabilities and digital auto tuning, which eliminates noise. Furuno FDF Fish Finders deliver the ability to spot individual fish with clarity, accuracy and detail. Whether in shallow or deep water, Furuno FDF Fish Finders give you what you would expect from a Fish Finder at all times.

Know More About the Fish Under Your Boat

Furuno’s award winning network Fish Finders offer a unique fish size analyzer function, ACCU-FISH™. The ACCU-FISH™ algorithm analyzes echo returns to compute individual fish size and display it on the screen.

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