Next-Level Performance & Amazing Range With The FSV-25 MARK-2

The FSV Scanning Sonars have long been favorite among commercial fishermen as they provides reliable and consistent detection of fish and seabed conditions with revolutionary, enhanced signal processing technology.

Fishing Vessels Workboats


  • NEW Features coming with FSV-25 Mark-2

    • [Fish Mark 2] newly added. Maximum of 20 fish marks can be entered per mark type
    • New Control Unit and Remote Controller for quick and easy operation
    • Export of echo data to TZ Professional software
      Learn more about TZ Professional at 
  • Fully extend the transducer in just 12 seconds for 1200 mm stroke and in 16 seconds for 1600 mm stroke

    A transducer “throw” time of just 12/16 seconds (respectively) places the FSV-25 MARK-2 among one of the fastest hull units available. You can extend and retract the transducer rapidly for smooth operation.

  • Extended detection range to identify schools of fish at great distances

    Thanks to recent advancements in low-frequency transducer elements, signal processing and increased transmission power, the detection range has been greatly improved (by about 30%) with the FSV-25 and FSV-25 MARK-2 series. You can instantly spot and follow schools of fish from several kilometers away.

  • Automatic target lock function for easy tracking of fast-swimming fish

    FSV-25 MARK-2 will automatically lock onto schools of fish, and display estimates of distance, depth, speed and angle of movement. Target lock is also available for stationary positions (speed and heading information required).

  • Graphical hull-unit indicator

    See exactly how much the transducer is lowered directly on your display with a simple graphical interface. Instantly spot if and how much the transducer is lowered or retracted, helping you avoid accidents and increase safety at sea.

  • Stabilization function for unwavering performance

    The stabilizer ensures that echoes are stable when received, regardless of transducer attitude, counteracting the rolling and pitching motions at sea.

  • Wired Remote and Sub Control Unit available

  • Stop function when extending and retracting transducer

    In order to avoid collisions with drift wood and other material, the transducer can be lowered to the desired position.
  • Echo strength distribution histogram

  • Auto filter for clear and uninterrupted performance

  • 3D Sonar Visualizer™ F3D-S (optional application)

    3D Sonar Visualizer™F3D-S is a new product that works in conjunction with the FSV-25/FSV-25S MARK-2 to show fish and sonar information in 3 dimensions. It uses the hull unit of your existing sonar but then processes the information in a unique way to show fish, peaks and sea floor data in a 3 dimensional "real world" view. Clearly see the size and shape of midwater marks to assess the best way to fish them and, with careful adjustment of the simple depth line control delete the seabed echoes to visualize fish schools close to the seabed.

    For more information, see 3D Sonar Visualizer™ F3D-S



Full digital beam forming
20 kHz
Basic Range
60, 100, 150, 200, 300, 400, 500, 600, 800, 1000, 1200, 1600,
2000, 2500, 3000, 3500, 4000, 5000 m

60, 100, 150, 200, 300, 400, 500, 600, 800, 1000, 1200, 1600,
2000, 2500, 3000, 3500, 4000, 5000, 10000 m (FSV-25S MK-2)
Audio Search
30°, 60°, 90°, 180°, 330° (selectable)
Audio Output
Audio terminal (requires speaker with amplifier)

Display Unit

Display unit
SXGA (1280×1024)
UXGA (1600×1200)
WUXGA (1920×1200)
32 colors (sonar picture), 6 colors (marks)
Head-up, North-up*, Course-up* and True Motion*
*External sensor required.
Display mode
Horizontal, Horizontal combination,
Vertical 1 combination, Vertical 2 combination
Additional functions
Custom mode, Interference rejecter, Echo Average, Noise
limiter, Signal level, Auto-tilt, Automatic target tracking
(target lock), Fish alarm, AGC, Reverberation suppression,
Noise suppression, Transducer stop location control,
Over-voltage warning, Unretracted transducer warning

Transceiver Unit

Beam width (horizontal)
TX: 360° x 7°, RX: 12° x 10° (-3 dB full width)
TX: 360° x 10°, RX: 16° x 14° (-6 dB full width)
Beam width (vertical)
TX: 360° x 29°, RX: 12° x 10° (-3 dB full width)
TX: 360° x 47°, RX: 18° x 13° (-6 dB full width)
-5° to 60° (downward)


5 Ports (Ver1.5/2.0/3.0/4.0/4.1)

Power Supply

Processor Unit
12-24 VDC: 10-5 A
Power supply unit
100/110/115/220/230 VAC: 14 A max, 1 phase, 50/60
Hull Unit
200 - 220 VAC: 16 A max, 3 Phase, 50/60 Hz
100/110/115/220/230 VAC, 1 Phase, 50/60 Hz


Processor Unit: -15 °C to +55 °C
Transducer: -5 °C to +35 °C
Control Unit: -15 °C to +55 °C
Others: 0 °C to +50 °C
Relative humidity: 93% max at +40 °C
Relative humidity
Control Unit: IP22 (panel), IP20 (chassis)
Processor Unit: IP22
Remote control Unit: IPX4
Transceiver Unit, Power Supply Unit, Junction Box: IP22
Hull Unit: IPX2
Transducer: IPX8


Interconnection Diagram


  • FSV-25 MARK-2
    (Last update: Mar 28, 2023)

* Specifications subject to change without notice.