Internal Fish Finder

NavNet TZtouch2 is the first product from FURUNO to feature the brand new RezBoost™ technology.
Accurately spot individual fish and increase your catch.

Multi Beam Sonar
Innovative tool for exploring a wide range of water column and seabed

Scanning image of Multi Beam Sonar

New Multi Beam Sonar model DFF-3D gives you real-time 120 port-starboard view of the water column and seabed up to 200m depth*. The DFF-3D allows you to explore fishing spots and find fish in deep water by far faster than conventional single beam sounders. On the other hand, the main beam penetrate right under the boat at a depth of approximately 300 m*. Installation is made easy, thanks to a compact transducer design. The built-in motion sensor gives you clear images under your boat even in rough water.

* Maximum depth dependent on installation, bottom type and water conditions.

  • 3D history

  • Side Scan

Up to 8 times sharper image than conventional FDF*


Rezboost™ is a revolutionary new technology utilizing FURUNO's advanced digital signal processing to provide fantastic resolution without having to change your transducer.

  • Conventional Signal Processing

  • RezBoost™ Signal Processing

Every NavNet TZtouch2 display has a built-in Fish Finder that is dual-frequency (50/200kHz), and has a 600W/1kW power output. With TZtouch2, Furuno is introducing a new, proprietary Fish Finder technology, called RezBoost™. RezBoost™ is a revolutionary new feature that utilizes Furuno's exclusive digital signal processing protocol to produce fish targets and images that are up to 8 times sharper than a conventional Fish Finder*, without the need to change out your narrowband transducer*1, or purchase an expensive broadband transducer.

* RezBoost™ performance may vary depending on depth, range and signal frequency used.
*1 To check if your transducer supports the "Enhanced Mode", see the list below on this page. In-hull mounted transducers are not compatible with RezBoost™ technology.

FURUNO Digital Filter (FDF™) 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.

Up to 10 times sharper image than conventional FDF*2

Find More Fish With TruEcho CHIRP™ Fish Finder

An advanced technology for both professional and enthusiast fishermen. Designed to operate across a wide range of frequencies utilizing a broadband transducer, the TruEcho CHIRP™ network Fish Finder delivers significant advantages in signal clarity and target definition. Due to the constant sweep of frequencies the TruEcho CHIRP™ network Fish Finder is capable of gathering more and higher quality data than a traditional single frequency Fish Finder. The clear presentation marks individual game fish and bait fish, even when tightly schooled together. TruEcho CHIRP technology delivers up to 10 times sharper image over conventional FDF*2.

*2 TruEcho CHIRP™ performance may vary depending on depth, range and signal frequency used.

  • High Frequency CHIRP

  • Low Frequency CHIRP

  • High Frequency
    Wide Beam CHIRP

  • Low Frequency
    Wide Beam CHIRP

ACCU-FISH™ (Fish Size Analyzer)

The ACCU-FISH™ algorithm analyzes echo returns in order to compute individual fish size. The algorithm is capable of computing fish size ranging from 10 cm up to 199 cm long. Fish depth can also be displayed.

In some instances, fish size indicated on the NavNet TZtouch2 may differ from its actual size. Please carefully read the operator's manual prior to utilizing this feature.

Bottom Discrimination Display

Bottom discrimination provides detailed information about Knowing the make-up of the seabed, categorizing it into four different categories; “Rocks”, “Gravel”, “Sand” and “Mud”.
The make-up of the seabed can be tremendously helpful information when looking for fishing grounds, as well as for finding good anchoring spots.

Internal Fish Finder DFF1-UHD DFF3 DFF-3D NEW
Frequency Dual frequency
50kHz and 200 kHz
Dual frequency
50±20 and 200±25 kHz
The synthesized transducer works with dual frequencies between
28 and 200 kHz
165 kHz
Range Scale Up to 1,200 m Up to 3,000 m Up to 1,200 m
Transducers 600 W or 1 kW* 1 kW 1, 2 or 3 kW 800 W
ACCU-FISH™ Available N/A
Bottom Discrimination Available N/A N/A
TruEcho CHIRP™ N/A Available N/A N/A
RezBoost™ Available N/A
Display Mode Auto (Fishing/Cruising/Manual), Bottom Zoom, Bottom Lock, A-Scope Triple/Single Beam Sounder, Side Scan, Cross Section,3D history

DFF1/BBDS1 are fully compatible with NavNet TZtouch2.
* Matching Box MB-1100 required for some specific FURUNO transducers.
** For DFF3, with 50/200-1T transducer only.
*** Coming soon.

TRANSDUCER LIST for NavNet TZtouch2 Internal RezBoost™ Fish Finder

Frequency Type Matching Box required Mount Output Power ACCU-FISH™ mode Bottom Discrimination Display RezBoost™
TRANSDUCER 50/200 kHz 520-5PSD   Thru-hull 600 W

525-5PWD Transom

520-5MSD Thru-hull

520-PLD Thru-hull


Thru-hull 1 kW

50 kHz 50B-6

Thru-hull 1 kW - - -

Thru-hull - - -
200 kHz 200B-5S

Thru-hull - - -
TRIDUCER 50/200 kHz 525T-BSD   Thru-hull 600 W

525T-PWD   Transom

525T-LTD/12   Thru-hull

525T-LTD/20   Thru-hull

SS60-SLTD/12   Thru-hull

SS60-SLTD/20   Thru-hull

525STID-MSD   Thru-hull

525STID-PWD   Transom

526TID-HDD   Thru-hull 1 kW