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The DFF-3D is an innovative tool for efficient fish location and seabed profile surveying, utilizing new multi beam technology. Highly detailed images are derived from the combination of an advanced signal processing system and an amazingly compact multi beam transducer.

  • Video
  • Features
  • Modes Overview
  • TZ Pro & DFF-3D
  • Specs
  • Conn. Diagram
  • Downloads
TZ Professional with DFF-3D
FURUNO DFF3D Multi-Beam Sonar Introduction
TZ Professional with DFF-3D

Field impression in Tokyo Bay, Japan

System Installation
System Installation
3D history mode
3D history mode
Deep water detection (approx. 450 ft / 150 m)
Deep water detection (approx. 450 ft / 150 m)
Shallow water detection (approx. 100 ft / 33 m)
Shallow water detection (approx. 100 ft / 33 m)
Other captures (Structure/Wreck...)
Other captures (Structure/Wreck...)

Visibly see he landscape and fish schools at great depths in amazing detail

Turn your NavNet TZtouch series MFD into a multi beam sonar that can see 120-degrees port to starboard, allowing you to see the depth and direction fish schools are moving, while displaying the seabed condition in real time. .

  • Sidebar detection range is up to 200 m (over 650 feet)* in a 120-degree swath port and starboard direction.
  • Deep water, main beam penetration directly under the boat is approx. 300 m (over 980 feet)*.

*Depending on bottom, water and installation conditions.

The compact and fully featured transducer

  • The compact transducer allows easy installation.
  • The built-in motion sensor (standard supply) stabilizes the display to give clear and stable images even under rough sea conditions.

Customize the display according to your needs

  • Depending on the situation and preference, a combination of screen modes can be displayed.

Modes Overview

 - DFF-3D with groundbreaking four modes bring a whole new dimension to your fishing.

Cross Section

Cross section displays the real-time sea column echo in 120 degrees port and starboard. This mode aids in instantly understanding the distribution of bait fish and the water column condition.

3D Sounder History

The 3D sounder history provides an intuitive and easy to understand 3D image of the seafloor, along with fish school icons. This mode is useful in a variety of situations, such as selecting a fishing hot spot and assessing the seabed condition.

Triple/Single Beam Sounder

A single (directly under boat) or triple direction (middle, left and right) fish finder image is displayed simultaneously. The Triple beam display helps to understand the depth of fish targets and the seabed condition in each direction, as well as the direction the target fish are moving. Each beam angle and beam width are selectable.

Side Scan

Side scan clearly displays the shape of structure as a high definition image in port and starboard direction.

It is suitable for searching the seabed and understanding the sea floor structure.

TZ Professional v3 with DFF-3D

When paired with TZ (TIMEZERO) Professional software and the optional PBG module, the DFF-3D can generate up to 50 depth points per second to quickly create a highly accurate Personal Bathymetric Generated (PBG) database. The following screenshots show how the PBG database is dynamically created with the DFF-3D, in comparison with conventional Fish Finder models.

Further details on TIMEZERO website.

DFF-3D x TZ Professional v3, astonishing results.

The wide coverage of the DFF-3D beams helps draw the PBG map much faster (50 points per second) than any conventional Fish Finder.

With conventional Fish Finders, the recorded area in the PBG database is limited to 1 point per second due to narrower scanning beams.

- SATELLITE COMPASS required as the primary source of position, heading, and motion (roll/pitch/heave) data.

- The DFF-3D can detect and generate a PBG database down to 200 m. When the depth is deeper than 200 m, the PBG source can be switched from the DFF-3D (multi-beam) to a Fish Finder (single beam).


TX Frequency

165 kHz

Output Power

800 W

Minimum Range

3 m

Basic Range

5-1200 m

Detection Range

200 m* (Side Beam Best Performance)
300 m* (Main Beam Directly Under Boat) *Depending on bottom, water and installation.

Beam Angle for Triple Beam Sounder

20°-50° from right under

Display Mode

Triple/Single Beam Sounder, Side Scan, Cross Section, 3D Sounder History



1 port, Ethernet 10/100Base-TX

External KP

1 port (optional external KP kit required)



-15°C to + 55°C

Relative humidity

93% or less at +40°C





12-24 VDC, 1.4-0.7 A

Rectifier (PR-62, option)

100/110/220/230 VAC, 1 phase, 50/60Hz



Multi Beam Sonar
B54 (Bronze, for thru-hull mount)
SS54 (Stainless, for thru-hull mount)
or TM54 (for transom mount)

Spare Parts, Installation Materials


External KP Kit
Cable Assembly (2 m/10 m)



Interconnection Diagram

This product is compatible with NavNet TZtouch 3, NavNet TZtouch 2 and NavNet TZtouch or Windows OS with TZ professional software**.

For more information about our NavNet products, please click the link below.

* System version requirement for NavNet series:

NavNet TZtouch (TZT9/TZT14/TZTBB) version 5.01 or later

NavNet TZtouch2 (TZTL12F/TZTL15F) version 5.01 or later

** Software version requirements for TZ Professional:

version 3.3 or later