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FURUNO FCV-628 5.7" Color LCD Fish Finder - New RezBoost™ technology provides incredible boost in resolution & target separation when using a compact narrowband transducer. Dual frequency fish detector equipped w/ zBoost signal processing technology. Configurable alarm function (depth, echoes of fish, etc.). Fast transfer speed of 3,000 PRR (Pulse Repetition Rate) per minute (at a depth of 5m)


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FCV-628 uses revolutionary new RezBoost™ technology, providing an incredible boost in resolution and target separation, utilizing a compact narrowband transducer. Improved clarity and resolution that was previously impossible with conventional narrowband transducers has been made possible thanks to the new RezBoost™ technology.
Compared to conventional signal processing techniques (FDF), a RezBoost™ fish finder produces an image that is up to 8 times clearer. What can be done with a conventional narrowband transducer (sold separately) is truly impressive.

Thanks to this increase in resolution, the accuracy of the ACCU-FISH™ function is also improved.


ACCU-FISH™ - A unique fish size analyzer based on the latest digital technology.  ACCU-FISH™ is very useful when you need to determine fish size, but also has the added benefit of making fish echoes more visible when viewed from a distance. With ACCU-FISH™ you can spot individual fish echoes even from the deck on your vessel.
Recognize individual or multiple fish instantaneously! ACCU-FISH™ is a fish size assessment function of FCV628 that is proprietary to FURUNO. In order to assess individual fish size, echo returns are evaluated based on strength and turned into fish size display on screen. ACCU-FISH™ can detect fish size from 10 to 199 cm, in depths of 2 to 100 m.

The fish mark can be utilized to display individual fish echoes when they are detected. It helps beginners to identify fish echoes for a more engaging fishing experience. Fish marks are selectable from either a circle or square, as well as, two fish symbols. The fish symbols, displayed in two different sizes (Large: over 50 cm, Small: 10 to 49 cm), are a great help for anglers when identifying individual fish. The circle and square symbols identify individual fish without hiding the underlying echo.

Bottom Discrimination - Analyze Bottom StructureProvides an at-a glance recognition of bottom composition with four types of graphical displays (Rocks/Sand/Gravel/Mud) when connected to a supported thru-hull or transom mount transducer.
White line characteristic: Difference of fish near the bottom. The upper edge of the bottom echo is shown in white to clearly demonstrate the lower structures. This feature helps differentiate between weeds and bottom fish.
Configurable alarm function (depth, echoes of fish, etc.). With the FCV628’s Fish Alarm function, when fish echoes appear in an area preset by the user, the FCV628 will sound a loud alarm and display an alarm icon on-screen. The integrated alarm can also be set to be triggered by specific conditions for water depth, target depth, water temperature, bottom type and more. You never have to miss a target again!
Share and display information on a chart plotter*. FURUNO's TLL (Target Lat/Lon) output allows you to interface the FCV-628 with your FURUNO chart plotter so that you can mark fishing grounds with various information (L/L, Depth, Water Temp, Fish size and Bottom type). 
* Requires a chart plotter
Fast transmission rate of 3,000 PRR (Pulse Repetition Rate) per minute (at 5 m depth range)
*Two Year Factory Warranty on the FCV628
Display unit5.7" TFT color LCD
Pixel numberVGA 480 x 640
Frequency50 and 200 kHz
Transducer600 W
Range Scale2-1200 m
Pulselength & PRR0.04-3 ms, Max 3,000 pulse/min
Display ModeSingle frequency (50 or 200 kHz), Dual frequency, Zoom, Nav data, A-scope, Marker zoom, Bottom zoom, Bottom-lock, Bottom Discrimination, ACCU-FISH™, RezBoost™
Bottom DiscriminationYes
Power Supply12-24 VDC, 11-0.5 A
Size207 (H) x 170 (W) x 132 (D)
WeightBracket Mount: 1.3 kg
Flush Mount: 0.9 kg

In the Box

  • FCV628 5.7" Color LCD Sounder
  • Mounting Bracket & Knobs
  • White Plastic Front Cover
  • Powercord/Multi Cable Assy
  • Installation hardware
  • Lens Cloth
  • Operator's Manual

Interconnection Diagram
FURUNO FCV-628 Fishfinder