ECHO SOUNDER
Japan Radio Co., Ltd. (JRC)
Refurbished
The JRC JFE-680 is a professional navigational echo sounder manufactured by Japan Radio Co., Ltd. (JRC), Japan. It was designed for accurate shipboard depth measurement and clear presentation of underwater echo information.
The JFE-680 combines a 10.4-inch color TFT LCD, 50/200 kHz operation, integrated thermal printer, depth-history recording and multiple presentation modes in a compact all-in-one unit. JRC documentation confirms compliance with IMO performance standard MSC.74(69) Annex 4.
The SM MARINE SERVICE™ stock unit shown here is powered and displaying the JFE-680 docking-mode interface with 200 kHz information visible on screen.
Manufacturer: Japan Radio Co., Ltd. (JRC)
Country of Origin: Japan
Model: JFE-680
Product Type: Navigational Echo Sounder
Display: 10.4-inch Color TFT LCD
Display Resolution: 640 × 480 pixels
Operating Frequencies: 200 kHz / 50 kHz
Marine Application: Shipboard water-depth measurement and seabed echo presentation
Current Status: Discontinued model
Official Replacement Family: JRC JFE-400 / JFE-700
JRC's October 2025 service-parts status lists the JFE-380/680 as discontinued in 2025, with service parts still available at the time of that publication and JFE-400/700 identified as the replacement models.
The JFE-680 transmits ultrasonic pulses through a hull-mounted transducer toward the seabed. The system measures the returning echo and calculates water depth, allowing navigation officers to monitor under-keel conditions.
The equipment can operate with one or two transducers and supports 50 kHz and 200 kHz configurations. Depending on installation, the frequencies can be operated independently or simultaneously, and the system can also be arranged for separate bow/stern depth indication.
• 10.4-inch high-visibility color TFT LCD
• 640 × 480 pixel resolution
• 200 kHz and 50 kHz operation
• 8-color or 8-level monochrome echo presentation
• Integrated thermal printer
• Standard Mode
• History Mode
• Docking Mode
• Automatic Gain
• Automatic Range
• Depth alarm
• Power-failure alarm
• System-error alarm
• Up to 24-hour depth preview/history
• Dual-frequency or bow/stern configuration depending on installation
• IEC 61162-1 navigation-data interface
• Direct gain and range controls
• Wall or flush mounting options
Display: 10.4-inch Color TFT LCD
Resolution: 640 × 480 pixels
Frequency: 200 kHz / 50 kHz
Echo Colors: 8 colors or 8-level monochrome
Digital Depth Resolution: 0.1 m where applicable
Depth Ranges: 10 / 20 / 50 / 100 / 200 / 500 / 800 m
Depth Accuracy: ±2.5%
Minimum Sounding Depth: 1.0 m at 200 kHz; 2 m at 50 kHz
Draft Adjustment: Up to 50 m in 0.1 m steps
Presentation Modes: Standard / History / Docking
Echo Display Time: 5 / 10 / 20 / 30 minutes
Preview Memory: Up to 24 hours
Power Supply: 100–115 / 200–230 VAC ±15%, 50/60 Hz ±5%
24 VDC: Used for power-failure monitoring circuit
Power Consumption: Less than 50 W
Protection: IPX2 drip-proof
Display Unit Mass: Approximately 8 kg
These values are taken from JRC's official JFE-680 documentation.
JRC documentation identifies several important JFE-680 system components:
JFE-680 – Main Display Unit
UT-200ND – 200 kHz Transducer
UT-50MD – 50 kHz Transducer
NKF-341 – 200 kHz Transducer Mounting
NKF-345 – 50 kHz Transducer Mounting
AW-154F – 200 kHz Matching Box
AW-154F-50 – 50 kHz Matching Box
7ZPJD0384 – Printer Paper
BRBX05351 / BRBX05355 / BRBX05354 – Flush Mounting Kits
BRBX05340 – Table Mounting Kit
A secondary transducer, matching box and associated cable can be used as an optional configuration.
Used for normal navigation and continuous presentation of water-depth and seabed echo information.
Allows operators to review stored depth information. JRC specifies up to 24 hours of memorized depth data, providing useful historical feedback.
Designed to provide useful depth presentation during operations where close monitoring of water depth is important, including harbor and docking situations.
The supplied SM MARINE SERVICE™ unit can be seen operating in DOCKING MODE.
The JRC JFE-680 can be used aboard:
• Cargo Ships
• Bulk Carriers
• Container Ships
• Oil & Chemical Tankers
• LNG/LPG Carriers
• Passenger Ships
• Offshore Vessels
• Research Vessels
• Merchant Ships
The equipment provides bridge personnel with continuous water-depth information for navigation, shallow-water monitoring, port approaches and docking operations.
Check the incoming AC supply, circuit protection, internal power section and electrical connections.
Inspect the transducer, matching box, cable and associated connectors. Also confirm that the correct frequency and range are selected.
Possible causes include aerated water, poor transducer conditions, inappropriate gain/range settings, cable problems or interference.
Check transducer performance and the associated AW-154F / AW-154F-50 matching box where fitted. Confirm that the selected frequency corresponds with the installed transducer.
Check thermal paper installation, printer mechanism and printer-related electrical connections.
Check the relevant transducer, matching box, cabling and channel configuration before replacing the main display.
Inspect IEC 61162-1 interface wiring and the external navigation equipment providing data to the JFE-680.
JRC officially specifies the following alarm functions:
• Depth Alarm
• Power Fail Alarm
• System Error Alarm
The system configuration also provides water-depth alarm, system alarm and power-supply alarm interfaces.
Exact fault diagnosis should follow the applicable JRC instruction/service documentation rather than replacing components based solely on an alarm indication.
• Inspect the display and control panel regularly.
• Keep ventilation areas clean.
• Check printer operation and thermal paper.
• Inspect transducer cables and connectors.
• Verify matching-box connections.
• Confirm accurate depth readings against known conditions when appropriate.
• Check both 50 kHz and 200 kHz channels where installed.
• Inspect IEC 61162-1 interface wiring.
• Investigate intermittent readings before they become permanent failures.
• Use correct replacement components matching the installed frequency.
SM MARINE SERVICE™ can support sourcing of JRC JFE-680 complete units and replacement components, subject to availability.
Typical requirements include:
• Complete JFE-680 Echo Sounder
• Main Display Unit
• LCD / Display Components
• Integrated Printer
• Thermal Printer Parts
• PCB / Electronic Boards
• Power Supply Components
• UT-200ND 200 kHz Transducer
• UT-50MD 50 kHz Transducer
• NKF-341 Transducer Mounting
• NKF-345 Transducer Mounting
• AW-154F Matching Box
• AW-154F-50 Matching Box
• Cables and Connectors
• Mounting Kits
• Internal Electronic Components
Equipment may be available in new, used, refurbished, reconditioned or tested working condition, depending on current stock.
Because JRC discontinued the JFE-680 in 2025, good used and reconditioned components can be particularly useful for maintaining existing shipboard installations. JRC's published replacement models are the JFE-400 / JFE-700.
Many vessels already have JFE-680 transducers, matching boxes, wiring and bridge installations in place.
When only the display, printer, PCB, power section or another component fails, maintaining the existing installation with a compatible replacement can sometimes be more practical than immediately changing the complete echo-sounder system.
Its dual-frequency capability, integrated printer, depth-history storage and straightforward controls also make the JFE-680 a familiar system for many marine operators.
The JFE-680 is a navigational echo sounder manufactured by Japan Radio Co., Ltd. for shipboard water-depth measurement.
It supports 200 kHz and 50 kHz operation.
It uses a 10.4-inch color TFT LCD with 640 × 480 resolution.
JRC documentation specifies UT-200ND for 200 kHz and UT-50MD for 50 kHz, with associated mounting/matching equipment depending on installation.
Yes. The JFE-680 incorporates a thermal printer for recording displayed information.
Yes. JRC's service-parts status lists JFE-380/680 as discontinued in 2025.
JRC identifies the JFE-400/700 as replacement models for JFE-380/680.
SM MARINE SERVICE™ can support sourcing of complete JFE-680 units and associated replacement components for worldwide customers, subject to stock.
Yes. Used, tested working, refurbished and reconditioned JFE-680 equipment may be available depending on stock.
Yes. Worldwide supply and shipping can be arranged according to stock availability and destination.
JRC JFE-680 Navigational Echo Sounder is a 50/200 kHz marine depth measurement system featuring a 10.4-inch color TFT LCD, integrated thermal printer, Standard/History/Docking display modes and up to 24-hour depth history. SM MARINE SERVICE™ can support worldwide supply of complete JFE-680 units, transducers, matching boxes and spare parts in used, refurbished, reconditioned and tested working condition.
Official JRC documentation includes technical specifications, component numbers, transducer configuration, system connections and outline drawings.
Download JRC JFE-680 Official PDF
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
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