Marine Radar Repair, Magnetron Replacement & Calibration in India
Seanav Marine is India’s leading technical service provider for commercial marine radar troubleshooting, magnetron replacement, antenna gearbox overhauls, and ARPA calibration.
Seanav Marine provides 24/7 marine radar repair, magnetron replacement, transceiver overhaul, and performance monitor calibration across all Indian ports. Our radar technicians service X-Band (9 GHz) and S-Band (3 GHz) ARPA radar systems from Furuno, JRC, Sperry Marine, and Raytheon Anschütz. We maintain extensive stocks of genuine marine magnetrons (MG5241, MG5436, M1458), microwave limiters, circulators, and scanner drive motors to resolve faults before vessel departure.
Radar magnetron replacement enquiries
If targets become weak or disappear, send the radar make and model, scanner type, X-band or S-band, transmitter hours and fault codes. Weak returns can also come from the receiver or antenna system. Include the existing magnetron part number if available so we can assess the fault and check the replacement against the radar model.
For radar repair during a vessel call at Ennore, see the Kamarajar Port service guide for the information to send before arrival.
⚙️ Technical Specifications & Operational Coverage
| Supported Radars | Furuno (FAR-2117 / FAR-2127 / FAR-2827 / FAR-2837S / FAR-22x8 / FAR-3000 Chart Radar), JRC (JMA-9100 / JMA-9200 / JMR-9200), Sperry Marine (VisionMaster FT / BridgeMaster E), Raytheon Anschütz (Synapsis / NSC) |
|---|---|
| Common Services | Magnetron Renewal, Microwave Limiter & Circulator Overhaul, Pulse Modulator Repair, Scanner Gearbox Belt & Motor Replacement, Performance Monitor Calibration, Heading Line Alignment |
| Magnetron Stock | MG4010, MG5241, MG5436, M1458, M1568BS, MG5223F, MSF1425B (Type-Approved OEM Tubes) |
| Attendance SLA | 2 to 4 hours to berths at Mumbai/JNPA, Kandla, Mundra, Chennai, Cochin, Vizag (subject to berth security pass clearances and technician dispatch); same-day anchorage attendance |
| Testing Standards | Calibrated microwave power meters, frequency spectrum analyzer, noise figure meter, IMO Res. MSC.192(79) |
🏷️ Supported OEM Brands & Equipment
Our engineers are equipped with manufacturer diagnostic keys, test software, and genuine spare parts for leading bridge electronics manufacturers:
📋 Standard Marine Radar Overhaul & Magnetron Replacement SOP
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Pre-Service Safety Lockout & High-Voltage Discharge
Isolate radar main power breaker; discharge transceiver high-voltage pulse capacitors (10 kV) safely before accessing scanner pedestal or bulkhead unit.
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Transceiver RF Diagnostics & Tube Inspection
Measure filament heater voltage, evaluate magnetron emission hours, inspect waveguide for condensation or burning, and check performance monitor reading.
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Magnetron & Microwave Component Replacement
Install new genuine magnetron tube, renew circulator and PIN diode limiter if insertion loss is detected, apply fresh thermal conductive compound.
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AFC Tuning, Heading Alignment & Sea Target Verification
Perform automated and manual AFC cavity tuning, calibrate trigger delay and heading line alignment against optical bearing, and verify target detection on 12/24 NM ranges.
🔍 Prevalent Marine Radar System Failures
| Reported Defect | Root Cause Diagnosis | Technical Remediation |
|---|---|---|
| Radar Displays "NO TX / TX TIMEOUT / HIGH HV ALARM" | Magnetron filament open circuit, pulse modulator FET breakdown, or safety interlock switch failure. | Component-level modulator repair and magnetron replacement. |
| Target Echoes Extremely Weak Beyond 3 Nautical Miles | Magnetron emission depleted or receiver frontend microwave limiter blown by nearby vessel radar. | Limiter and magnetron renewal, followed by receiver sensitivity calibration. |
| Scanner Antenna Not Rotating / "SCANNER ERROR" | Gearbox motor carbon brush wear, broken drive belt, or inverter drive PCB failure. | Pedestal motor brush renewal, belt tensioning, and gearbox lubrication. |
Emergency S-Band Radar Transceiver Overhaul at Chennai Port
Reported Problem: Vessel entered Chennai roadstead in heavy rain with S-band radar failing to transmit; display alarming "HV OVERLOAD".
Technical Diagnosis: Internal arcing inside S-band magnetron (MG5223F); modulator pulse transformer insulation breakdown.
Corrective Attendance: Boarded at Jawahar Dock Berth 4. Replaced pulse transformer and magnetron from regional stock. Tuned 3.05 GHz receiver cavity and verified target echoes off Chennai lighthouse at 24 NM.
🌐 Strategic Indian Port & Equipment Authorities
Explore specialized technical resources and 24/7 engineer coverage across key Indian shipping hubs:
Mumbai Port (MbPA)
24/7 attendance across Indira Dock, Pir Pau & Mumbai Floating Light (BFL) anchorage.
View Mumbai Hub →JNPA / Nhava Sheva (JNPT)
Fast-track attendance for BMCT, APMT GTI, NSICT & NSIGT container terminals.
View JNPA Hub →Adani Mundra Port
Container berths, West Basin coal terminal, SPM & Mundra Roads anchorage support.
View Mundra Hub →Deendayal Port (Kandla)
Gandhidham depot covering cargo berths 1-16, Tuna Tekra & Vadinar offshore SPM.
View Kandla Hub →Chennai Port (ChPT)
Container terminals CCTPL, CITPL, Jawahar Dock & Kamarajar Ennore attendance.
View Chennai Hub →Cochin Port / ICTT
ICTT Vallarpadam berths, Cochin Shipyard & OPL East-West route launch service.
View Cochin Hub →Visakhapatnam (Vizag)
VCTPL container terminal, ore berths, Gangavaram Port & Dolphin’s Nose anchorage.
View Vizag Hub →Programming Authority
Certified MMSI reprogramming, AIS static data, VHF DSC & EPIRB Hex ID re-coding.
View Programming Scope →Flag Change Package
Turnkey single-attendance reprogramming for ship flag, name & ownership changes.
View Flag Change Scope →Reviewed & Certified by Technical Operations Directorate
Lead Marine Electronics Surveyor & Technical Director · Seanav Marine Pvt Ltd
Master technical oversight for SOLAS Chapter IV & V navigational safety and radio communications. Certified in statutory marine radio surveys, gyro compass meridian calibrations, radar transceiver overhauls, and VDR APT protocols across 170+ commercial Indian ports and anchorages.
❓ Frequently Asked Questions
Yes. We stock genuine, factory-fresh magnetrons for Furuno, JRC, Sperry Marine, and Raytheon Anschütz radars across our regional depots in Mumbai, Gujarat, Chennai, and Kochi.
Yes. Our engineers are certified for Working at Heights with complete safety harnesses, fall-arrest systems, and marine PPE.