Executive Summary (BLUF): Marine gyrocompass annual service, overhaul, repair, and genuine spare parts supply are vital statutory operations mandated under IMO SOLAS Chapter V Regulation 19. Seanav Marine provides certified 24/7 attendance across worldwide ports for annual performance checks, gyrosphere exchange, supporting liquid renewal, optical alignment, and emergency bridge repairs for all 39 marine gyrocompass models across Tokyo Keiki, Sperry Marine, Anschütz, Yokogawa, Simrad, Teledyne TSS, Alphatron, and GEM Elettronica.
What Does Comprehensive Gyro Compass Service Include?
At Seanav Marine, our marine gyrocompass service exceeds basic routine inspections. Our OEM-trained technicians perform rigorous multi-point servicing to guarantee accurate geographic true North heading and fault-free transmission to shipboard RADAR, ECDIS, AIS, and Autopilots:
- Annual Performance Check (APC): Comprehensive inspection of heading repeatability, rotor spinning frequency, voltage ripple checks, optical pick-off bridge nulling, and follow-up servo gain tuning.
- Container Chamber Overhaul: Draining deteriorated supporting fluid, chemical descaling of electrode contact pins, ultrasonic cleaning, and container O-ring gasket replacement.
- Supporting Liquid Renewal: Refilling with certified OEM electrolyte supporting fluid and lab-grade medical deionized water mixed to exact specific gravity.
- Sensitive Element & Gyrosphere Exchange: Hot-swap exchange of pre-balanced gyrospheres with verification of spin-down time (>15 minutes free spin) to prevent rotor bearing failure.
- Signal Transmission & Bridge Verification: Testing multi-channel RS-422 NMEA 0183 ($HEHDT at up to 40 Hz), 6-step-per-degree repeater drivers, and emergency 24V DC battery changeover relays.
Master Directory: All 39 Gyrocompass Models Serviced & Supported
Seanav Marine provides certified annual performance checks (APC), complete container overhauls, gyrosphere exchanges, supporting liquid replacement, inverter repairs, and genuine OEM spare parts supply for all 39 major marine gyrocompass models:
Tokyo Keiki (Formerly Tokimec)
- Tokyo Keiki TG-8100 Gyro Compass
- Tokyo Keiki TG-8600 Gyro Compass (HSC 70 kts)
- Tokyo Keiki TG-8000 Gyro Compass
- Tokyo Keiki TG-8500 Gyro Compass
- Tokyo Keiki TG-6000 Gyro Compass
- Tokyo Keiki TG-5000 Gyro Compass
- Tokyo Keiki ES-160 Gyro Compass
- Tokyo Keiki ES-140 Gyro Compass
- Tokyo Keiki ES-110 Gyro Compass
Sperry Marine (Northrop Grumman)
- Sperry Marine NAVIGAT 2200 Gyro Compass (FOG)
- Sperry Marine NAVIGAT 3500 Gyro Compass
- Sperry Marine NAVIGAT 2500 Gyro Compass
- Sperry Marine NAVIGAT 200 Gyro Compass
- Sperry Marine NAVIGAT 100 Gyro Compass
- Sperry Marine NAVIGAT X MK 1 Gyro Compass
- Sperry Marine NAVIGAT X MK 2 Gyro Compass
- Sperry Marine MK 37 Gyro Compass
- Sperry Marine MK 39 Gyro Compass (RLG AHRS)
- Sperry Marine MK 49 Gyro Compass (SINS)
- Sperry Marine MK 27 Gyro Compass
- Sperry Marine SR 120 Gyro Compass
Raytheon Anschütz
YDK Technologies (Yokogawa)
Simrad (Kongsberg / Navico)
Teledyne TSS / S.G. Brown
Alphatron Marine (JRC)
GEM Elettronica
Maintenance Intervals & Recommended Servicing Schedule
Adhering to manufacturer-mandated service intervals prevents hazardous at-sea heading freeze, synchro drift, and class survey non-conformities:
| Service Stage | Recommended Interval | Standard Work Scope |
|---|---|---|
| Routine Annual Check | Every 12 Months | Checking flotation current, testing slip rings, inspecting drive belts, cleaning air filters, and conducting BITE error code diagnostics. |
| Fluid & Gasket Renewal | Every 12–24 Months | Draining container electrolyte, cleaning centering contact pins, replacing container seals, and refilling with fresh supporting fluid. |
| Sensitive Element / Gyrosphere Overhaul | Every 3–4 Years (Mechanical) | Replacing mechanical floating gyrosphere (Tokyo Keiki 10229409H, Sperry 074829, Anschütz 110-233) with factory-certified balanced elements. |
| Solid-State FOG / RLG Diagnostics | Condition-Based (>100k h MTBF) | Optical power margin analysis, laser cavity threshold testing, Ethernet BAM alert verification, and DC power conditioning inspection. |
Genuine Gyrocompass Spare Parts Ready to Dispatch
Seanav Marine maintains extensive global warehouse inventories of ready-to-ship genuine and reconditioned gyrocompass spares:
- Gyrospheres & Sensitive Elements: Pre-calibrated and balanced for Tokyo Keiki, Sperry Marine, Anschütz, and Yokogawa.
- Supporting Liquid & Gasket Kits: Factory-sealed bottles of electrolyte, damping oil, and fluorocarbon O-rings.
- Power Inverters & Servo Boards: 3-phase gyro rotor inverter boards, follow-up amplifiers, and CPU control cards.
- Mechanical Drive Spares: Azimuth stepper motors, carbon/silver brush blocks, precision timing belts, and slip rings.
- Repeaters & Interface Converters: Digital heading repeaters, bearing tape repeaters, and step-to-NMEA 0183 heading converters.
Global Port Service Network & 24/7 Rapid Attendance
Seanav Marine service engineers attend commercial vessels, tankers, container ships, bulkers, and offshore support vessels across major global ports:
- 🇦🇪 United Arab Emirates: Jebel Ali, Port Rashid, Dubai Maritime City (DMC), Fujairah Offshore Anchorage (riding squads via launch), Sharjah, Hamriyah, Mina Saqr, Khalifa Port, Ruwais.
- 🇴🇲 Oman: Sohar, Salalah, Muscat, Duqm.
- 🇮🇳 India: Mumbai, JNPT, Kandla, Mundra, Cochin, Chennai, Visakhapatnam, Kolkata.
- 🇪🇬 Egypt & Suez Canal: Port Said, Suez Anchorage, Alexandria, Damietta, and transit attendance during canal convoys.
- 🇧🇭 Bahrain & Arabian Gulf: Mina Salman, Khalifa Bin Salman, Sitra, Ras Laffan, Dammam, Jubail.
- 🌏 Major International Hubs: Singapore, Shanghai, Ningbo, Busan, Rotterdam, Houston.
Frequently Asked Questions (FAQ)
What is included in a Seanav Marine annual gyrocompass service?
Our annual gyro service includes comprehensive mechanical and electronic inspection: checking rotor spin currents, testing follow-up servo gain, cleaning slip rings, replacing container supporting fluid, inspecting drive belts and brushes, calibrating latitude/speed error corrections, and issuing an IMO-compliant service report.
How often must the sensitive element or gyrosphere be replaced?
Mechanical liquid-suspended gyrospheres and sensitive elements (such as Tokyo Keiki 10229409H, Sperry 074829, or Anschütz 110-233) have a recommended replacement interval of 3 to 4 years (or 25,000 to 30,000 running hours) to prevent rotor bearing wear and sudden loss of heading.
Can your technicians board vessels at Fujairah offshore anchorage?
Yes. We provide 24/7 offshore launch boat attendance for vessels bunkering or anchored off Fujairah (Anchorages A, B, and C). Our engineers carry necessary replacement fluids, gyrospheres, and diagnostic tooling directly onboard.
Do you support both mechanical gyros and modern Fiber Optic Gyros (FOG)?
Yes. We service conventional liquid-suspended gyrocompasses as well as advanced solid-state Fiber Optic Gyroscopes (such as Sperry NAVIGAT 2200, Anschütz Standard 30 MF, and GEM Polaris FOG) and dry Dynamically Tuned Gyroscopes (Teledyne TSS Meridian).
