Simrad GS25 GPS Antenna

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The Simrad GS25 GPS antenna is the ideal GPS for any navigator that requires extremely accurate and rapid vessel position and speed updates. 

Unlike other position-only antennas, the GS25 provides magnetic heading for accurate boat direction at any speed and for radar/chart overlay. 

The GS25 easily connects to any Simrad NS Series multifunction display or any NMEA 2000® network. It is fully waterproof and can be pole or surface mounted on any vessel.

*Please note this product is not suitable for use with MARPA or autopilot systems which requires a rate compass such as the RC42.



  • High Speed Position Update
  • Rapid Signal Acquisition
  • Consistent Position Accuracy
  • Integrated Magnetic Heading
  • GPS, WAAS, EGNOS and More
  • Compact Design
  • Fully Waterproof
  • NMEA 2000® Connectivity
  • Simrad Yachting Construction


  • Heading Sensor Accuracy: +/- 3º Heading, +/- 1º Roll/Pitch @ 30º 
  • Power Consumption typical: < 2 W 
  • Weight: 0.14 kg (0.3 lbs) 
  • Compass Safe: 0.5 m (20") 
  • N2K PG Ns: 126992, 129025, 129026, 129029, 129539, 129540, 127258, 127250, 127251, 127257 
  • NMEA 2000 Connectivity: 1x NMEA 2000 Micro-C port, 2 LEN 
  • Power Consumption max: 2 W 
  • Warranty Period: 2 Years 
  • Operating Temperature Range: -25°C to 60°C 
  • GPS Receiver Channels: 32 Channels 
  • Position Accuracy: 3m (9.8 ft) 
  • Time to First Fix: 3s (Cold Start 50s) 
  • Storage Temperature Range: -40 to + 85ºC 
  • Humidity: 40ºC, 93% RH, operating 
  • Supply Voltage: 9 V DC - 18 V DC 
  • Dimensions Diameter: 93 x 38 mm (3.54" x 1.50") 
  • Approvals Compliance: CE under RED 2014/53/EU Directive 
  • Correction: DGPS, WAAS, EGNOS, GLOANASS, MSAS, Galileo 
  • Mounting Type: Flush mount / Standard Pole Mount 
  • Waterproofrating: IPX7 
  • Heading Sensor Data Available: Magnetic, Heading, Rate of Turn, Heel Angle, Trim Angle 
  • Heading Sensor Data Protocol: NMEA 2000 
  • Sensor Type: Solid state 
  • Update rate: Up to 10 Hz (1,5,10) 

Whats In The Box

  • N2K-T-RD Network T-Connector
  • Pole Mount GS25/ZG100/POINT-1
  • N2KEXT-15RD 15ft Network Extension Cable


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