Unmatched training speeds and High resolution echoes

Smart features for productive fishing

Recreational BoatsFishing Vessels
CAN bus 


  • Incredibly fast training speed

    ■ Faster motor delivering quicker training speeds 【NEW】
    Faster training speed can aid in earlier detection regarding fish targets or obstruction avoidance.

    ■ 6 step angles for speed adjustement according to the user's needs 【NEW】

    This CH-500 sonar is one of the most comprehensive and fastest sonars of its kind. It provides 6 selectable step variations (6°,12°,15°,18°,21° and 24°) for high scanning speed that can cover sectors widths from 24° to 360° in a couple of seconds. Thanks to its high training speeds, the CH-500 can rapidly scan a large area providing the ultimate fishing and navigational experience.

    Expert tip: While moving fast, use the 24° step scan in order to get a glimpse of the surroundings. If you detect something interesting, slow down and switch to a decreased step angle for clearer echoes.

  • Smart features to efficiently find local fish

    ■ Built-in motion sensors provide a stabilized target presentation in rough sea conditions   
    【Standard equipment】 ​ 

    The CH-500 searchlight sonar is the first of its class to have integrated motion sensors.
    In rough seas, vessels tend to move in every direction. This movement can cause inaccurate target information to be displayed. The role of the integrated motion sensors is to precisely compensate for those negative effects and provide accurate data to the user.

    In the right hand picture above, you can see that once the stabilizer is activated, the bottom echo recovers its circular shape. The sonar is then able to provide accurate data in different sea conditions. Thanks to its integrated motion sensors, the CH-500 is able to detect fish that didn’t appear with the non-stabilized echo.

    ■ Reverberation reduction function 【NEW】

    The reverberation reduction offers both better understanding and better appreciation of
    the nature of detected echoes. Below is an example of how the Reverberation reduction function highlights the wreck from the surrounding seabed. .

    *The echo may be subject to interferences from other Fish Finders 
    *Schools with excessivly high density may appear with a weaker echo color

    ■  Full-circle A-Scope mode and audible target detection 

    The A-Scope mode shows the last detected echoes with one single color. The nature of the target can be quickly understood as the size of the echo is greatly amplified and even the smallest echoes are shown.
    *The more opaque the color, the latest the echo.  

    The CH-500 also features fish and obstacle audio signals depending on the nature and the size of the detected object. Whether there are air bubbles, big or small fish schools, and seabed, the emitted sound is different. This feature shows its usefulness when used with the Full-circle A-scope mode, our recommanded combination to know the nature of the target with precision, and during long sea trips, as it frees the user from continuously watching the screen.  

    Small fish school

    Big fish school



    *Optional Loudspeaker required

    ■ Quick Gain Control

    ■ Various display modes

    11 display modes for various situations.

    ・Horizontal (zoomed)
    ・Echo sounder
    ・Full-circle A-Scope
    ・Horizontal/ Full-circle A-scope
    ・Horizontal/ vertical (split)
    ・Horizontal/ Vertical (side window)
    ・Horizontal/ A-Scope
    ・Echo Sounder/ A-Scope

  • Image clarity and high resolution echoes

    ■ Higher resolution due to advanced signal processing【NEW】

    A powerful signal and image processing techniques, based on a unique interpolation technology, provides images in high resolution. Even if the fish are located near the seabed, the different echoes are clearly shown and easy to understand. The higher resolution display yields a presentation that is crisp and clear. 

    ■ Semi-transparent menu 【NEW】

    Keep an eye on the targets while changing the settings in the menu thanks to a semi-transparent window

  • Designed for all environments

    ■ 12.1 inch, High brilliance display (XGA) 

    ■ Water-resistant to withstand the most rigorous environments

    Display unit (MU-121) Control Unit (CH-502), Hull unit and Transceiver unit are all water-resistant (IP55)

    ■ Hull unit offering various installation possibilities

    ・ 5 choices of frequency (60/88/150/180/240Khz)
    ・ 2 types of stroke 250/400mm, 5 lengths of shaft, various cable lengths 
    ・ 2 types of power supply (VDC 12/24)
    ■  Blackbox configuration allowing use of other displays 

    Users can install their favorite HDMI monitor (local supply) if choosing the black box configuration 
  • 12 languages available

    English, Thai, Vietnamese, Chinese, Spanish, Indonesian, Malay, Burmese, French, Norwegian, Italian, Japanese 





60/88/150/180/240 kHz (Selectable)
Basic Range
10m ~ 2400m, 15 steps

Display Unit

Display unit
12.1" Color LCD Display
Pixel number
XGA (1024 x 768)
Echo color: 32, 16 or 8 colors (Selectable)
Back-ground: 3 colors selected (Selectable)
Display mode
Normal screen: Horizontal, Horizontal (zoom), Vertical, Full-circle A-Scope, Echo Sounder
Split screen: Half-Horizontal + Vertical, Horizontal + vertical, Horizontal + Full-circle A-scope, Horizontal + A-Scope, Horizontal + History, Echo Sounder + A-Scope

Transceiver Unit

Output Power
0.8 kW to 1.5 kW (depending on frequency)
Level: 100 dB max, Distance: 1000 m max
Audio Output
2 W (8 ohms)
Frequency 0.9 to 1.2 kHz(external speaker required)

Hull Unit

Raising/Lowering time
30 s st 400 mm travel, 20 s at 250 mm travel
Allowable Ship's Speed
20 kn or less (15 kn during raise/lower operation)


●Video signal output : 1 port, HDMI, XGA
●NMEA0183 : 2 ports, V1.5/2.0/3.0/4.0/4.1, 4800/9600/19200/38400 bps
●NMEA2000 : 1 port
●External KP : 1 port. I/O

Power Supply

Power supply unit
12-24 VDC: 4.7-2.3 A
Hull Unit
12-24 VDC: 2.2-1.1 A
(7.2/3.6 A: during raising)
100/110/115/220/230 VAC, 1 phase, 50/60 Hz, 13 A max


Display/Transceiver/Control Unit: -15°C to +55°C
Hull Unit 0°C to + 55°C
Display/Control Unit IP55
Transceiver/ Hull Unit IP22


Display Unit: 4.0 kg , 9 lb
Transceiver Unit: 3.3 kg , 7.2 lb
Hull Unit: 41 kg , 90 lb (Travel: 400 mm), 40 kg , 88 lb (Travel: 250 mm)


Interconnection Diagram

Equipment List


  • Display UnitMU-121C
  • Control UnitCH-502
  • Transceiver UnitCH-503
  • Hull Unit*CH-504 (400 mm transducer travel)
    CH-505 ( 250 mm transducer travel)
    *Depending on the selected configuration
  • Installation Materials and Spare Parts


  • Control UnitCH-502
  • Remote ControllerCH-256
  • LoudspeakerCA-151S-ASSY
  • Rectifier UnitRU-1746B-2
  • Display Unit installation kit, Installation kit, Cable, Mounting Bracket , Retraction Tank