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ComNav G2 GNSS Satellite Compass, NMEA 0183, w/15m cable - 11220001

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List price: $3,392.95
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ComNav G2 GNSS , NMEA 0183, w/15m cable - 11220001

The Vector G2ComNav G2 GNSS GPS Compass is a state-of-the-art electronic navigation data device.  It is capable of providing highly accurate, high-precision position and heading data to a wide variety of marine Navigation equipment, such as autopilots, sonar, radar, chartplotters, AIS receivers & transponders, and many other types of marine devices & systems. The ComNav G2 GNSS features fast start-up and signal re-acquisition times, heading & position updates at up to 20 times per second, and can operate at sustained turn rates up to 90° per second. The ComNav G2 GNSS is a complete GPS Compass in a single rugged, marine-grade enclosure.  It needs only one single power/data cable, which greatly simplifies installation. 

  • New: Supports both GPS and GLONASS satellites for complete redundancy
  • New: Heading accuracy < 0.25° rmsSatellite Compass
  • New: Position accuracy < 0.3m 95% confidence (DGPS)
  • New: An integrated 9 Axis Inertial Measurement Core (IMC technology) provides enhanced roll, tilt and heading stability even during momentary loss of satellite signals
  • New: IMO Compliant G3 color display system (optional)
  • New: Engineered enhancements to exceed sealed IP67 rating
  • New: Extended 2 year warranty • NMEA 0183 and NMEA 2000® interface
  • Type approved as primary heading AND positioning device
  • Heave, Pitch, Roll and Rate of Turn as standard output
  • Heading updates 1 to 20 Hz
  • BAUD Rate selectable: 4800, 9600, 19200, 38400,115200
  • Fully compatible with on board NMEA 0183 and NMEA 2000® RADAR, ECDIS, AIS, Cameras, SONAR, PC and Autopilots
  • Compact integrated surface mounting (Pole mount optional)
  • IMO Compliant, Wheelmark and USCG approved
  • Pre-programmed default settings for Heading, Rate of Turn, Course over Ground, Lat/Long position, Time & Date
  • 1PPS output standard
  • 15 meter serial cable standard (30 meter optional)
  • 6 meter NMEA 2000® Cable (Optional)
  • CE certified for EMI and RFI immunity
  • Worldwide service

 There are two models available – the ComNav G2 GNSS Satellite Compass and the ComNav G2B GNSS Satellite Compass. They are identical, except in their Differential GPS (DGPS) correction features: 

  • The G2 can obtain DGPS information from many Space-Based Augmentation System (SBAS) sources (in areas where compatible ones are available & operational), including WAAS, EGNOS, MSAS, SNAS, GAGAN and others.  The G2 can also accept DGPS information from an external data source. 
  • The G2B has an additional integrated beacon receiver module, which allows it to use conventional terrestrial DGPS Radiobeacon signals to obtain DGPS information, in addition to SBAS sources & external DGPS data sources. 

The G2 GPS Satellite Compass supports multiple RF front ends - enabling tighter coupling of measurements from separate antennas for use in heading-based products. Users will achieve excellent accuracy and stability due to the more accurate code phase measurements, improved multi path mitigation, and fewer components.

The G2/B’s GPS antennas are separated by 50 cm between their phase centers, resulting in 0.5° rms heading performance. The G2/B provides heading and positioning updates of up to 20 Hz and delivers positioning accuracy of 1.0 m 95% of the time when using differential GPS corrections from beacon (G2B only) or from Space Based Augmentation Systems (SBAS).

The G2/B also features technology that enables ComNav GPS Satellite receivers to utilize old differential GPS correction data for 40 minutes or more without significantly affecting the positioning quality. The G2/B is less likely to be affected by differential signal outages due to signal blockages, weak signals, or interference.

GPS Sensor Specifications

  • Receiver Type: L1, C/A code, with carrier phase smoothing
  • Channels: Two x 32 parallel tracking GPS, GLONASS, SBAS
  • Update Rate: Standard 10 Hz, Selectable up to 20 Hz (position and heading)
  • Horizontal Accuracy: < 0.3 m 95% confidence (DGPS)*   < 2.5 m 95% confidence (autonomous, no SA)**
  • Heading Accuracy: < 0.25º rms
  • Pitch / Roll Accuracy: < 1º rms
  • Rate of Turn: 90º / sec max
  • Start-up Time: < 60 sec typical
  • Heading Fix: < 10 sec
  • Satellite Reacquisition: < 1 sec
  • Timing Output: 1PPS, 50 ns accuracy, CMOS

Beacon Receiver Specifications (G2B)

  • Channels: 2-channel, parallel tracking
  • Frequency Range: 283.5 to 325 kHz
  • Operating Modes: Automatic (signal strength or range) and manual
  • Compliance: IEC 61108-4 beacon standard


  • Serial Ports: 1 full-duplex RS-232 and 1 full-duplex RS-422
  • Baud Rates: 4800 - 115200
  • Correction I/O Protocol: RTCM v2.3 (DGPS), RTCM SC-104
  • Data I/O Protocol: NMEA 0183 / Optional NMEA 2000® / Proprietary ASCII
  • Heading Warning I/O: Open relay system indicates invalid heading
  • NMEA Heading Messages: $GPHDT, $GPROT, $PSAT, $GPHDM, $GPHDG
  • Timing Output: 1PPS CMOS, active low, 10KΩ, 10pF load


  • Operating Temperature: -32ºC to +74ºC (-25ºF to + 165ºF)
  • Storage Temperature: -40ºC to +85ºC (-40ºF to + 185ºF)
  • Humidity: 0 - 99% non-condensing


  • Input Voltage: 10 to 36 VDC
  • Power Consumption: ~ 3 W nominal
  • Current Consumption: ~ 250 mA @ 12 VDC
  • Isolation: Power supply isolated from serial ports
  • Reverse Polarity Protection: Yes


  • Dimensions: (see figure)
  • Weight: G2: 2.2 kg (4.8 lb) / G2B: 2.7 kg (5.9 lb)
  • Power/Data Connection: 18-pin, Environmentally sealed  IP67 sealed 
  • 15m or 30m cable (options)

Aiding Devices

Gyro: Provides smooth heading, fast heading reacquision and reliable < 1º heading for periods up to 3 minutes when loss of GPS has occured (static conditions)

Tilt Sensor: Assists in fast start up of heading solutions

* Depends on multipath environment, number of satellites in view, satellite geometry, baseline length (for local services),

and ionospheric activity.

** Depends on multipath environment, number of satellites in view, and satellite geometry

Additional Options:

  • 30m NMEA 0183 Serial Data Cable
  • 6m NMEA 2000® Cable (not IMO compliant)
  • Color LCD Sunlight G3 Instrument Display

This product is the next generation replacement for ComNav Model 11210001, which is no longer available.

ComNav G2&G2B Brochure (G2G2B_Nov2013_WEB.pdf, 272 Kb) [Download]

ComNav G2&G2B Installation Manual (29010091_v1r0_Vector_G2-G2B_New_Installation_Operation_Manual_11220001.pdf, 860 Kb) [Download]

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