JRC JMA-9225 X-Band Radar Complete Set

JRC JMA-9225 X-Band Radar Complete Set (25 kW IMO / SOLAS ARPA)

The Japan Radio Co., Ltd. (JRC) JMA-9225 is an IMO/MED type-approved 25 kW X-Band ARPA marine radar designed for commercial ocean-going vessels, oil tankers, bulk carriers, passenger vessels, and workboats exceeding 10,000 GT. Operating in the 9410 MHz (±30 MHz) marine radar band, the JMA-9225 utilizes high-efficiency coaxial magnetron transmission coupled with JRC’s patented Constaview™ DSP engine. This delivers real-time target trace updates without heading-change blur, enhanced sea/rain clutter discrimination, and high-density automatic target tracking (TT/ARPA).

Supplied as a fully configured bridge navigation package, this complete set integrates the high-definition marine display console, central processing unit, ergonomic operation keyboard/trackball controller, and an external pedestal scanner unit with a high-gain open-array radiator (available in 6 ft or 9 ft configurations). Built for 24/7 mission-critical operations, it complies fully with SOLAS carriage requirements Chapter V, IMO MSC.192(79), IEC 62388, and IEC 60945 bridge environmental standards.

Model Details:

• Primary System MPN: JMA-9225 (Configurations: JMA-9225-6XA / JMA-9225-9XA / JMR-9225 Series)
• Display Unit: NCD-2189 / 26-inch WUXGA (1920 × 1200) or high-resolution marine raster-scan monitor
• Central Processing Unit (Processor): NDC-1590 / NDC-1480 Series Bridge Processor
• Operation Keyboard & Trackball Unit: NCE-5699 / NCE-5085 Series
• Transceiver / Turning Pedestal: NKE-1125 (25 kW Up-Mast Scanner Unit)
• Antenna Radiators:
  • NAX-16R-6 (6-foot End-Fed Slotted Array, 1.2° beamwidth)
  • NAX-16R-9 (9-foot End-Fed Slotted Array, 0.8° beamwidth)
• Internal Transmitter Module / Modulator PCB: CMC-1205R2 / CQD-2273 Series
• Power Supply Unit: NQA-2155 / Integrated bridge power conditioning module

Technical Details

Features

1. High-Power 25 kW Transceiver Performance: Delivers long-range target detection across ranges from 0.125 NM up to 96 NM, utilizing multi-pulse switching (0.07 µs to 1.2 µs) for optimized short-range target separation and deep-sea situational awareness.
2. Real-Time Constaview™ Digital Processing: High-speed graphic processing eliminates azimuth redraw lag and sweeping smearing during high-rate turns, ensuring stable relative and true vector trails.
3. Advanced ARPA & AIS Integration: Tracks up to 100 automatic/manual target-tracking (TT) targets simultaneously and displays up to 500 AIS targets (expandable via license) with real-time CPA/TCPA alerts and vector calculations.
4. Safety Zone Viewer & Dynamic Target Enhancement (TEF): Multi-level echo averaging and TEF sharpen micro-targets (e.g., navigation buoys, small wooden hulls, sea markers) while suppressing sea and precipitation backscatter.
5. Bridge Ergonomics & Trackball Interface: Heavy-duty marine control console with independent EBL/VRM rotary encoders, dedicated clutter potentiometers, and trackball control designed for bridge wing and darkened wheelhouse operation.

Applications

• SOLAS Ocean-Going Vessels: Commercial tankers, VLCCs, bulk carriers, container ships, and heavy-cargo vessels requiring IMO Category 1 or 2 compliant radar suites.
• Offshore Energy & OSVs: Dynamic positioning supply vessels (PSVs), AHTS, drilling rigs, and offshore support barges requiring precise target hold during station-keeping.
• Commercial Tug & Towing: Coastal and ocean towing operations requiring close-quarters harbor maneuvering, split-second range gating, and anti-collision tracking.
• Retrofit Bridge Modernization: Direct drop-in replacement for retiring JRC radar installations (such as JMA-9122, JMA-9253, and JMA-7100 series) using existing bridge console cutouts and interface protocols.

Frequently Asked Questions

What components are included in the JRC JMA-9225 complete set?

The complete set includes the 25 kW NKE-1125 turning pedestal, 6 ft or 9 ft open-array antenna radiator, the NDC processor unit, the NCD high-resolution 26-inch marine color display console, the NCE keyboard/trackball operation controller, and internal interconnect boards.

Can the JMA-9225 X-Band radar connect directly to our existing gyrocompass and AIS?

Yes. The processor features dedicated multi-format terminal allocations supporting synchro, stepper, and digital IEC 61162-1/2 (NMEA 0183-HS) inputs for gyro heading, as well as high-speed RS-422 ports for bi-directional communication with all standard Class-A AIS transponders.

What is the primary difference between the 6-foot and 9-foot antenna array options?

The 6-foot antenna has a 1.2° horizontal beamwidth, offering a lower wind drag profile for smaller wheelhouses or vessels with mast constraints. The 9-foot antenna narrows the horizontal beamwidth down to 0.8°, significantly improving bearing resolution and distinguishing adjacent targets on long-range navigational scales.

What tests are conducted on reconditioned JRC JMA-9225 units before dispatch?

Each reconditioned system undergoes complete RF bench analysis: magnetron peak output power measurement, receiver tuning calibration, PRF line verification, high-voltage modulator stress testing, full TT/ARPA calculation validation, and an continuous 24-hour thermal burn-in run.

Is the JRC JMA-9225 compliant with mandatory SOLAS carriage regulations?

Yes, the JMA-9225 is MED (Wheelmark) type-approved and meets IMO MSC.192(79) and IEC 62388 specifications for commercial vessels under SOLAS Chapter V carriage requirements.