Furuno Black Box Fishfinder

Furuno Black Box Fishfinder


The Furuno Black Box Fishfinder is a network fish finder that features an updated bottom discrimination function and the Furuno Digital Filter capability.

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Furuno Black Box Network Fishfinder

The Black Box Network Fishfinder is a network fish finder for NavNet 3D and NavNet TZtouch that features an updated bottom discrimination function, as well as the FDF (Furuno Digital Filter) capability of the DFF1. The Black Box Network Fishfinder determines the bottom structure and separates them into the following categories: mud, sand, gravel, and rock. This is achieved by analyzing echo characteristics from the bottom components such as particle size and hardness.

Connect the Black Box Network Fishfinder to your NavNet 3D or NavNet TZtouch network and get ready for your NavNet system to provide you with valuable information to locate rich fishing grounds, boosting your catch.

There are two bottom discrimination display modes to select from, Standard Mode and Probability Mode. In Standard Mode, the most probable materials on the bottom (mud, sand, gravel or rock) are indicated in either graphic mode or a 4-color bar on the bottom of the display.

Because bottom material can change frequently and can sometimes be difficult to identify, Probability Mode shows you what material the bottom has the greatest chance of consisting of by displaying the possible bottom materials proportionally within the 4-color bar.

Standard Features

  • Frequency: 50/200 kHz alternately transmitted
  • Output Power: 600 W/1 kW
  • Power Supply: 12-24 VDC: 1.1-0.4 A (in output power of 1 kW)
  • Temperature : -15° to +55° C (in operation)
  • Relative Humidity: 93% at 40°C
  • Waterproofing: IP20 (not waterproofed)

Required Conditions for Bottom Discrimination

  • Detection Range: 5-100M
  • Boat Speed: 0-10 kn
  • Transducer mounting: Thru-hull or transom mount only
  • MFD8/12/BB software: v2.06 or later


  • The result shown by this function may sometimes be different from the actual bottom components.
  • For best performance, do not use in-hull mounted transducers with the BBDS1.
  • The BBDS1 may show an incorrect ground discrimination result, especially when there is a big fish school right under the boat. This is because enough echoes may not be received from the bottom.
  • Materials such as shell, coral, or a sunken ship are indicated as the most similar material from the four bottom categories:mud, sand, gravel, or rock, according to reflected echoes.
  • Auto mode is automatically activated when the bottom discrimination function is turned on. (Manual mode is not selectable.)
  • The BBDS1 is not compatible with NavNet 1 or NavNet vx2.
  • Appropriate Furuno Transducer recommended for best results

Bottom Discrimination Transducers below:


Image Part # Product Description Price Stock Order
Furuno Black Box Fishfinder BBDS1 Black box fishfinder
Usually ships in 1-2 weeks
Image Part # Product Description Price Stock Order
Furuno Bronze Thru-Hulls 520-5MSD Bronze Thru-Hull, transducer, 8 meter cable with 10 pin connector
In Stock
Furuno Bronze Thru-Hulls 525STID-MSD Bronze Thru-Hull, speed and temperature, 30 foot cable with 10 pin connector, high-speed fairing block
Usually ships in 1-2 weeks
Furuno Plastic Thru-Hulls 520-5PSD Plastic thru-hull, transducer, 8 meter cable with 10 pin connector
Usually ships in 1-2 weeks
Furuno Plastic Transom Mount  Transducer 525STID-PWD Plastic transom mount transducer with temp, depth and speed, 600w, 30 foot cable with 10 pin connector
In Stock
Furuno Plastic Transom Mount Transducers 525-5PWD Plastic transom mount transducer, 600w, 8 meter cable with 10 pin connector
In Stock
Furuno Rubber Coated Transducer CA50/200-1T Rubber coated transducer, 1kW, 50/200 kHz, 10 meter cable without connector
Usually ships in 1-2 weeks
Furuno Bronze Thru-Hulls CA50/200-12M Bronze Thru-Hull, 1kW transducer, 10 meter cable with no connector
In Stock
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