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ComNav Vector G2B GNSS Compass with NMEA 0183 Output w/15 Meter Cable - 11220003

ComNav Vector G2B GNSS Compass with NMEA 0183 Output w/15 Meter Cable - 11220003

Regular price $4,788.95 USD
Regular price $5,320.43 USD Sale price $4,788.95 USD
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Please Note: This is a Preorder item. We expect your order to ship sometime during the 1st week of July 2024. If you order now, you will be in the que to receive one of the incoming units. We have been told by the manufacturer, that we will not be receiving additional units until the end of June or early July 2024. We only have seven days to bill your credit card after placing an order, so your card may be billed prior to your order shipping.

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ComNav Vector G2B GNSS Compass with NMEA 0183 Output w/15 Meter Cable - 11220003

The Vector G2 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 Vector G2 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 Vector G2 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° rms 
  • 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 Vector G2 and the Vector G2B; they are identical, except in their Differential GPS (DGPS) correction features: 

The Vector 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 Vector G2 can also accept DGPS information from an external data source. 

The Vector 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 Vector G2’s enclosure contains a Hemisphere GPS® Crescent® GPS/SBAS receiver module 1 (containing twin GPS receivers, a single-axis gyro & a tilt sensor), dual GPS antennas and a power supply.  The Vector G2B also contains a DGPS Radiobeacon receiver module, and an H-field beacon signals antenna. When using DGPS corrections (SBAS, external, or Radiobeacon), the Vector G2 is capable of one metre precision for position sensing.  The GPS antennas inside the G2’s enclosure are separated by 0.5 metres, which provides 0.5 degree precision for heading sensing. 

The gyro and tilt sensor improve system performance, and can provide heading information for up to three minutes whenever the G2’s normal GPS-based heading is not available due to signal blockage, or other temporary factors. 

The Vector G2 also features Hemisphere’s exclusive COAST™ software, which enables the GPS receiver to utilize old DGPS correction data for 40 minutes or more without significantly affecting the quality of position reports.  The COAST feature means that the G2 is less likely to be affected by DGPS signal outages due to signal blockages, weak signals or interference. 

If you are new to GPS technology, we recommend that you consult Hemisphere’s GPS Technical Reference manual 2 for further information on the capabilities & general features of their Crescent-based GPS products, before proceeding. 

Note: while the Vector G2 & G2B are designed to provide highly accurate GPS position & heading data, even when subject to the pitching, rolling and wide speed range of marine vessels, the use of the G2s is not limited to the marine market. Other excellent applications include machine control, machinery guidance, container tracking, or indeed any application that requires high-precision position and/or heading information in an all-weather outdoor environment. 

The Vector G2 is factory-configured for easy use in typical marine situations.  The goal when the factory-default settings were being selected was that the G2 could be used “right out of the box” in most marine applications, with no changes required in configuration settings. 

ComNav hopes that you will be able to do exactly that … use your new Vector G2 right out of the box!  But if not, then the information in this user manual will show you how to adjust your G2 to operate to meet your specific needs.


  • 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
  • Heave Accuracy: < 30 cm 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: Selectable 4800 - 115200
  • Correction I/O Protocol: RTCM v2.3 (DGPS), RTCM SC-104
  • Data I/O Protocol: NMEA 0183 / 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 Protect: Yes 


  • Weight: G2: 2.2 kg (4.8 lb) / G2B: 2.7 kg (5.9 lb)
  • Power/Data Connection: 18-pin female circular, IP67 sealed 15m cable

Aiding Devices

Gyro: Single axis gyro provides reliable < 1º heading for periods up to 3 minutes when loss of GPS lock has occured

Tilt Sensor: Assists in fast GPS Signal Reacquisition

* 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