Simrad GS25 GPS Antenna

RRP: $369.00
Sup. No.
- +
Add to Wish List

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


The Sydney-to-Perth rail link is currently closed due to heavy rain and flooding. The Melbourne-to-Adelaide rail link is also closed due to damage caused by a train derailment.

This situation is causing extended delays of deliveries to Western Australia for the following shipping services:

- Australia Post eParcel - Regular
- TNT Road

If you need an order in Western Australia urgently, consider using  the "Australia Post eParcel - Express" service if it is available for your order. Alternatively contact our WA MAIL ORDER DEPARTMENT to discuss options based on stock already available in WA.


Australia Post and our Commercial Couriers are expecting the festive season to be extra busy this year. Based on their advice, we cannot guarantee orders placed after the cut-off dates listed below will be delivered by Christmas.

To avoid disappointment place your Christmas orders as early as possible.

State Regular Express
ACT 11th Dec 15th Dec
NSW 11th Dec 15th Dec
NT   5th Dec 11th Dec
QLD 11th Dec 15th Dec
SA 11th Dec 15th Dec
TAS 11th Dec 15th Dec
VIC 11th Dec 15th Dec
WA   1st Dec 11th Dec


Overseas, offshore islands and distant mainland locations may take up to 3 or 4 weeks to deliver. Please contact your local Mail Order Department to discuss specific details relating to your situation.


All orders are shipped from our Brookvale, Sydney order fulfilment centre. Orders are normally shipped within 5 business days - most quicker!

Shipping day estimates after your order leaves our fulfilment centre in Sydney are based on Australia Post domestic delivery times:

 State   Regular
 ACT   2 - 3 business days   1 - 2 business days
 NSW   2 - 4 business days   1 - 3 business days
 NT   4 - 13 business days   3 - 5 business days
 QLD   3 -12 business days   2 - 4 business days
 SA   3 - 5 business days   2 - 4 business days
 TAS   4 - 8 business days   2 - 4 business days
 VIC   3 - 5 business days   2 - 3 business days
 WA   5 - 10 business days   2 - 6 business days

Last updated 12/09/2023

* These delivery times are an estimate and actual delivery times may vary based on peak periods and other external factors. Bulky orders may take longer.

Shipping rates are automatically calculated based on live quotes supplied by our shipping partners. The quote takes into consideration, the bulk of your cart, where you want it delivered and if you want express or standard shipping.

Get a shipping rate estimate by adding items to your online cart. Go to the cart by clicking on the shopping cart icon located at the top right of the page. Then enter your shipping destination information into the "Estimate Shipping and Tax" section of the shopping cart summary.

International Shipping

We are currently unable to deliver online orders outside of Australia.

If you are located outside of Australia and wish to place an order offline. Please contact our Mail Order department or send us an enquiry via the orange help bubble located at the bottom right of this page.



Online purchases can be returned/exchanged within 30 days. Some exclusions do apply.

Visit our Returns Policy page for details on how you can return an item.