System Overview: Sperry Marine NAVIGAT 2200 Solid-State FOG
The Sperry Marine NAVIGAT 2200 represents Northrop Grumman Sperry Marine’s premium solid-state gyrocompass-fog/” class=”seanav-internal-link”>Fiber Optic Gyrocompass (FOG) solution. Engineered without any rotating mechanical parts, bearings, or supporting fluid containers, the NAVIGAT 2200 eliminates conventional gyrosphere overhauls and fluid replacements entirely. It delivers exceptional mean time between failures (MTBF > 100,000 hours), instant settle times, and extreme accuracy across harsh sea states, high-speed craft maneuvers, and offshore dynamic positioning operations.
Seamlessly integrated with Sperry Marine’s digital CompassNet bus architecture and NAVITWIN IV heading management systems, the NAVIGAT 2200 distributes heading, rate of turn (ROT), roll, and pitch data across dual Ethernet LANs and high-speed IEC 61162-1/2 serial channels with full Bridge Alert Management (BAM) compliance.
Technical Specifications: NAVIGAT 2200
| Parameter | Specification Details |
|---|---|
| Sensor Technology | Triaxial Solid-State Fiber Optic Gyroscope (FOG) / Hemispherical Resonator Technology |
| Settle Time | < 5 minutes (rapid alignment mode); no gimbal settling delay |
| Static Accuracy | < ±0.3° secant latitude |
| Dynamic Accuracy | < ±0.4° secant latitude under severe sea state 6+ conditions |
| Follow-Up Speed | Up to 100°/second tracking capability (IMO High-Speed Craft approved) |
| Interface Architecture | CompassNet CAN-Bus, Dual IEC 61162-450 Ethernet, RS-422 / NMEA 0183 ($HEHDT, $HEROT) |
| Operating Voltage | 115 / 230 V AC (50/60 Hz) main with seamless 24 V DC battery fallback |
| Power Consumption | Approx. 35 W steady state (high energy efficiency) |
| Certifications | IMO A.424(XI), A.821(19), MSC.116(73), Wheelmark MED, BAM IEC 62923-1/-2 |
Core Units, Modules & Field Replaceable Spares
| Module / Assembly | Part / Order Code | Description & Function |
|---|---|---|
| Sensor Unit FOG | NAVIGAT 2200 SU | Sealed solid-state optical sensing unit with internal DSP processing |
| Control & Display Unit (CDU) | 02200-CDU / Touch | Color touch interface displaying heading, ROT, status, and alerts |
| System Interface Unit (SIU) | 02200-SIU-BAM | Central distribution interface with serial channels, Ethernet & BAM relay contacts |
| Power Supply Unit (PSU) | 4993-PSU-2200 | Dual AC/DC auto-switch power supply conditioning assembly |
| CompassNet Bridge Gateway | CN-GTW-450 | IEC 61162-450 network bridge module for ECDIS & Radar distribution |
| Repeater Distribution PCB | 02200-RDP-01 | Step / synchro / 24V DC repeater drive interface board |
| Backup Battery Pack | BAT-2200-24V | Internal buffer battery maintaining heading through momentary blackouts |
Seanav Field Service & Maintenance Protocol
Because the NAVIGAT 2200 utilizes solid-state optical physics, annual mechanical sphere overhauls are eliminated. However, annual safety inspections and regulatory surveys require verification of interface lines, battery backup switchover, and alert management compliance:
- Firmware & Calibration Verification: Health checks on DSP calibration constants, optical drift rates, and diagnostic self-tests via the touch CDU.
- CompassNet Network Diagnostics: Bus integrity validation, packet collision testing, and verification of serial RS-422 telegram transmissions ($HEHDT at 40 Hz to radar and autopilot).
- Emergency Power Simulation: Verification of instant AC-to-DC 24V switchover without loss of heading reference or system reboot.
- BAMS & Alert Verification: Testing alert propagation to the Bridge Alert Management system under sensor obstruction or loss of speed log input.
Related Gyro Compass Service resources: Gyro Compass Service hub · GEM Elettronica Polaris FOG-100 Gyro Compass: Solid-State Naval Specs, PCBs & Spares · Alphatron AlphaMidiCourse Mk2 Gyro Compass: Wheelmark Specs, PCBs & Spares Directory · Alphatron AlphaMiniCourse Gyro Compass: Compact Commercial Specs, PCBs & Spares · Teledyne TSS Meridian Surveyor Gyro Compass: High-Precision Hydrographic Specs & Spares · Teledyne TSS Meridian Standard Gyro Compass: DTG Architecture, Specs & Spares Guide