top of page



Unmatched training speeds and High resolution echoes

Smart features for productive fishing


Recreational Boats & Fishing Vessels


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.

scanning step2.png
scanning speed.png

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.  


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

Quick Gain Control

■ 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 



Frequency - 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)

Colors - 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)

TVG - 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)

Rectifier: 100/110/115/220/230 VAC, 1 phase, 50/60 Hz, 13 A max


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

Waterproofing: Display/Control Unit IP55 - Transceiver/ Hull Unit IP22


Weight: 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)

Equipment List

  • Display Unit: MU-121C

  • Control Unit: CH-502

  • Transceiver Unit: CH-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 Unit: CH-502

  • Remote Controller: CH-256

  • Loudspeaker: CA-151S-ASSY

  • Rectifier Unit: RU-1746B-2

  • Display Unit installation kit, Installation kit, Cable, Mounting Bracket , Retraction Tank

bottom of page