JRC Marine Radar Systems
Japan Radio Co., Ltd. (JRC)
Refurbished
The JRC JMA-9100 and JMA-9900 Series are professional marine ARPA radar families developed by Japan Radio Co., Ltd. (JRC), Japan for commercial-vessel navigation, target detection and collision avoidance.
JRC currently lists both the JMA-9100 Series and JMA-9900 under its discontinued marine ARPA radar products, making good used and refurbished replacement components especially important for vessels still operating these systems.
The supplied image shows two large-format JRC radar consoles with integrated radar displays and operator control panels, consistent with the console architecture used in this generation of JRC commercial radar systems.
Manufacturer: Japan Radio Co., Ltd. (JRC)
Country of Origin: Japan
Product Family: JMA-9100 / JMA-9900 Series
Models Covered: JMA-9122, JMA-9132, JMA-9922 and related variants
Product Type: Marine Radar / ARPA Radar
Marine Application: Target detection, collision avoidance and ship navigation
Status: Discontinued / Legacy JRC Radar Series
The JMA-9122 belongs to JRC's JMA-9100 family.
Documented versions include:
JMA-9122-6XA
JMA-9122-9XA
JMA-9122-6XAH
The JMA-9122-6XA is documented with a 23.1-inch high-resolution TFT display, 6 ft scanner and 25 kW X-band transmitter, while the 9XA configuration uses a 9 ft scanner.
Main system functions include:
• ARPA target tracking
• AIS integration
• Gyro heading interface
• High-resolution radar presentation
• Trackball control
• Performance monitor
• Collision-avoidance support
The JMA-9132-SA is an S-band ARPA radar configuration within the JMA-9100 family.
Published specifications identify:
Scanner: 12 ft
Frequency Band: S-band
Transmitter Power: 30 kW
Rotation Speed: 24 rpm
Display: 23.1-inch TFT LCD
The larger S-band antenna provides strong commercial-vessel radar performance, particularly where stable target detection in difficult weather is important.
The JMA-9922 belongs to JRC's earlier JMA-9900 Series.
Documented variants include:
JMA-9922-6XA
JMA-9922-9XA
The official-style service documentation for the JMA-9900 family also covers JMA-9922-6XA, JMA-9922-9XA, JMA-9923 variants and S-band JMA-9932/9933 systems.
The JMA-9922 is a 25 kW X-band ARPA radar capable of professional commercial-vessel navigation and collision-avoidance operation. Published JMA-9900 specifications include range scales up to 96 NM and automatic target tracking.
• Professional marine ARPA radar
• X-band and S-band variants across the family
• 23-inch-class commercial navigation display
• Radar target tracking
• AIS interface capability
• Gyro heading interface
• True Motion / Relative Motion
• Head-Up / North-Up / Course-Up presentation
• Electronic Bearing Lines
• Variable Range Markers
• Guard zones
• CPA / TCPA collision information
• Radar target trails
• Sea clutter suppression
• Rain clutter suppression
• Performance-monitor capability
• Trackball and dedicated radar control panel
A complete JRC JMA-9100 / 9900 installation generally consists of:
• Radar Display Unit
• Radar Processor Unit
• Control Keyboard / Trackball Unit
• Scanner / Antenna Unit
• Transceiver
• Magnetron
• Modulator
• Performance Monitor
• Power Supply
• Gyro Interface
• AIS Interface
• ARPA / Target Tracking Electronics
• Scanner Motor
• Antenna Drive Unit
• Radar Cables & Connectors
• Internal PCBs and Processor Boards
Depending on model, commonly searched JRC radar components include:
NKE-2103 Series – X-band scanner family associated with JMA-9100 equipment
NKE-1130 – 12 ft S-band scanner associated with JMA-9132-SA
NJU-85 – X-band performance monitor used with applicable JRC radar installations
M1568BS / CMG-347 – Magnetron commonly associated with JMA-9122 X-band radar applications.
Exact compatibility must always be confirmed from the radar nameplate and scanner model.
These JRC radar systems remain installed aboard:
• Container Ships
• Bulk Carriers
• Oil Tankers
• Chemical Tankers
• LNG/LPG Carriers
• Cargo Ships
• Offshore Vessels
• Passenger Ships
• Merchant Vessels
Their main functions are safe navigation, target detection, collision avoidance and integration with bridge heading/AIS information.
Check scanner power, antenna drive motor, motor-control electronics, scanner cable and mechanical drive.
Check transmitter status, magnetron, modulator, receiver section, scanner cable and radar tuning.
Aging magnetrons, receiver problems, incorrect gain, excessive sea/rain clutter settings and antenna/scanner problems can all reduce target strength.
Magnetrons are service items in conventional high-power radar systems. If transmit performance falls, check magnetron hours and radar performance-monitor results before replacement.
Inspect gyrocompass input and radar gyro-interface equipment.
Check AIS interface, communication cabling and radar system configuration.
Inspect transceiver, modulator, magnetron, scanner electronics and safety interlocks.
Check keyboard/trackball connections and communication with the radar processor.
Compare radar bearing against known references and verify heading input and scanner alignment.
• Check magnetron operating hours.
• Test the radar performance monitor regularly.
• Inspect scanner rotation and abnormal noise.
• Check scanner cables and connectors.
• Inspect antenna drive components.
• Keep processor ventilation clean.
• Check gyro heading input.
• Verify AIS target information.
• Monitor radar tuning and transmitter performance.
• Investigate weak echoes before complete failure.
• Follow the applicable JRC service manual before internal adjustment.
Radar transmitters contain dangerous high voltage and microwave energy, so internal servicing should be performed only by qualified marine radar technicians.
SM MARINE SERVICE™ can support sourcing for:
JRC JMA-9122
JRC JMA-9132
JRC JMA-9922
JMA-9100 Series
JMA-9900 Series
Typical spare-part requirements include:
• Complete Radar System
• Radar Display
• Processor Unit
• Control Keyboard
• Trackball Unit
• Scanner / Antenna
• Transceiver Unit
• Magnetron
• Modulator
• Performance Monitor
• Scanner Motor
• Antenna Gearbox
• Power Supply
• ARPA Board
• AIS Interface Board
• Gyro Interface
• Processor PCB
• Receiver PCB
• Transmitter PCB
• Display PCB
• Radar Cables
• Connectors
• Internal Electronic Parts
Available condition may include:
New • Used • Tested Working • Refurbished • Reconditioned
Because these JMA-9100/JMA-9900 systems are discontinued, exact replacement components remain valuable for vessels that want to maintain their existing radar installation rather than perform a complete bridge retrofit.
Many commercial vessels already have these JRC radar systems integrated with:
• Gyrocompass
• Speed Log
• AIS
• GPS
• VDR
• Bridge consoles
• Radar scanners
• Existing cabling
Replacing only a failed display, processor, magnetron, scanner or PCB can therefore be more practical than changing the complete radar installation.
The correct model family is JMA-9122. JRC officially lists the legacy range as the JMA-9100 Series.
It is a commercial marine X-band ARPA radar from JRC's JMA-9100 series.
Documented JMA-9122-6XA and 9XA configurations use 25 kW X-band radar transmission.
It is a 30 kW S-band marine ARPA radar using a 12 ft scanner.
The JMA-9922 is an X-band radar from JRC's legacy JMA-9900 Series.
No. JRC lists the JMA-9900 family among its discontinued marine ARPA radar products.
Used, refurbished and reconditioned displays, processors, scanners, magnetrons, PCBs and other parts may still be sourced depending on availability.
SM MARINE SERVICE™ can support worldwide sourcing of complete radar systems and legacy JRC radar spare parts.
Yes. Used, tested working, refurbished and reconditioned JRC radar equipment can be sourced subject to stock.
JRC JMA-9122, JMA-9132 and JMA-9922 are professional commercial-vessel ARPA radar systems from JRC's legacy JMA-9100 and JMA-9900 families. Available configurations include high-power X-band and S-band radar systems with ARPA, AIS and gyro interface capabilities. SM MARINE SERVICE™ can support worldwide supply of displays, processors, scanners, magnetrons, control units, PCBs and complete JRC radar systems.
The JMA-9100 installation documentation covers models including:
JMA-9133-SA, JMA-9132-SA, JMA-9123-7XA/9XA, JMA-9122-6XA/9XA/6XAH and related models.
A publicly available JMA-9900 Series service manual covers:
JMA-9922-6XA, JMA-9922-9XA, JMA-9923-7XA/9XA, JMA-9932-SA and JMA-9933-SA.
JRC officially lists the JMA-9100 Series and JMA-9900 among discontinued ARPA radars.
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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