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Navigator G4 & G4B

GPS Satellite Compasses


Vector Sensor for Precise Heading and Positioning


Affordable solution delivers 2D GPS heading accuracy better than 0.1 degree

Differential positioning accuracy of less than 1m (DGPS)

Integrated gyro and tilt sensor deliver fast start-up times and provide heading updates during temporary loss of GPS

Fast heading and positioning output rates up to 10 Hz

Differential options including SBAS (WAAS, EGNOS, etc.) and optional beacon differential

Integral Display and User interface installed separately near operator

G4B can utilize terrestrial Radio Beacon Signals for DGPS corrections

Two antennas mounted separately to meet desired accuracy

The status lights and menu system make the G4 Series easy to monitor and configure

Advanced applications with user friendly configuration menu

Low power consumption

CE compliant for EMI and RFI immunity

One year warranty


G4 Series Specifications

Receiver Type: L1, C/A code, with carrier phase smoothing

Channels: Two 12-channel, parallel tracking (Two 10-channel when tracking SBAS)

Update Rate: Standard 5Hz, optional up to 10 Hz (position and heading)

Horizontal Accuracy: < 1 m (DGPS)* < 2.5 m (autonomous, no SA)**

Heading Accuracy: < 0.3 @ 0.5 m antenna separation < 0.15 @ 1.0 m antenna separation < 0.10 @ 2.0 m antenna separation

Pitch / Roll Accuracy: < 1.5 @ 0.5 m antenna separation

Rate of Turn: 90 / sec max

Start-up Time: < 60 sec typical

Heading Fix: < 20 sec

Satellite Reacquisition: < 1 sec

Maximum Update Rate: 10 Hz (heading and positioning)

Antenna Input Impedance: 50

Beacon Receiver Specifications (G4B version)

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: 2 full duplex RS-232C

Baud Rates: 4800 - 57600

Correction I/O Protocol: RTCM SC-104

Data I/O Protocol: NMEA 0183



Operating Temperature: -32C to +74C (-25F to + 165F)

Storage Temperature: -40C to +85C (-40F to + 185F)

Humidity: 95% non-condensing

Shock and Vibration: EP 455

EMC: FCC Part 15, Subpart B, Class B, CISPR22, CE



Input Voltage: 9 to 36 VDC

Power Consumption: < 5 W

Current Consumption: < 360 mA @ 12 VDC

Antenna Voltage Output: 5 VDC

Antenna Short Circuit Protection: Yes


Dimensions: 189mm L x 114mm W x 71mm H (7.4" L x 4.5" W x 2.8" H)

Weight: 0.86kg (1.9lb)

Status Indication: Power, primary GPS lock, secondary GPS lock, differential lock and heading lock

Power Switch: Miniature push-button

Power Connector: 2-pin, micro-Conxall

Data Connectors: DB9-female

Antenna Connectors: TNC-male



Gyro: Single Axis gyro provides reliable < 1 heading for periods up to 3 minutes when loss of GPS lock has occurred.

Tilt Sensor: Assists in fast start-up of RTK solution

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

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


15m NMEA 0183 Serial Data Cable

6m NMEA 2000 Cable

Color LCD Sunlight NX3 Instrument Display

Site Map

Contact us, Write, Fax, E-Mail,

Call M-F [9.00am-5.00pm Central US (- 6h GMT)] at:
Hellas Marine, Inc.

Chicago Marine Electronics
212 E. Crescent Ave.
Elmhurst IL. 60126

Phone : +1 (630) 501-1938

email cme


Marine Electronics, Communication, Navigation, Autopilots & Instrument Marine products.

  1. Note: Posted MAP (Minimum Advertised Price) or CME prices are subject to and may change with out prior notification. Contact us for current pricing.

  2. Note: Posted prices do not include TAX for Illinois State residence, S&H, Installation, Set-up, Training, Calibration, Local Taxes or Custom fees and Freight carrier clearance fees of items sold.

  3. Note: Minimum Ground Shipping & Handling Policy: We do not have a minimum required order but small orders take just as much time to pick, pack and process as larger orders. A minimum of $15.00 shipping fee apply to your order. If the actual cost of shipping your products exceeds $15.00, we will revert to charging the actual cost of shipping. Back Orders or products marked "Pre-Order" and/or product not available at the time of shipment will be charged shipping as they are are shipped.

  4. Note: Products are not returnable, all sales are final, "Hellas Marine, Inc." and dba "Chicago Marine Electronics" does not provide any warranty as to any product sold, items sold may not be returned to "Hellas Marine, Inc." and dba "Chicago Marine Electronics", pursuant manufacture's warranty, defective products are repaired or replaced by the manufacturer, as per manufacturer's warranty.

  5. Note: "Hellas Marine, Inc." and dba "Chicago Marine Electronics" are not responsible for freight expenses on any warranty items S&H.

  6. Note: At "Hellas Marine, Inc." and dba "Chicago Marine Electronics" discretion, all items returned for credit are subject to a 25% restocking fee, sorry no refunds.

  7. Note: Our services are a person to person basis, to maintain our good prices and the latest software versions on product sold our stock is low, orders are processed by the date they received. Ordered products are Billed/Charged upon order.

  8. Note: Reproduction and copy of any page, picture, document or material  used in the www.HellasMarine.com & www.ChicagoMarineElectronics.com web site for commercial or any other use with out written authorization from Hellas Marine, Inc. & Chicago Marine Electronics is prohibited.

Fraud Alert: Fraudulent use of the [email protected] email addresses, spam emails are send via email communication messages to undisclosed recipients by unauthorized senders, if you are not expecting an email from Hellas Marine or Chicago Marine Electronics please disregard and delete the email, we apologize for any inconvenience and thank you for your understanding.

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Copyright 2001  {Hellas Marine, Inc. dba Chicago Marine Electronics}. All rights reserved.

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