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

  • High speed position update - 10 times per second
  • Rapid signal acquisition
  • Consistent position accuracy
  • Integrated magnetic heading with an integrated eCompass/Gyro
  • GPS, WAAS, EGNOS and more
  • Compact design -ideal for flush-mounting or pole mounting


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.

Advanced 10 Hz performance ensures highly accurate, smooth and instant position updating (10 times per second)

Alongside rapid acquisition, the 16 Channel receiver provides consistent position accuracy and eliminates "jumping" on the display, ideal for high-speed powerboats.

100% compatible with WAAS, EGNOS, MSAS, Glonass, Galileo and QZSS satellite systems – get the most accurate location information, no matter where you are in the world!

Immediate satellite signal fixing with the 16 Channel receiver.

Best-in-class GPS/Glonass positioning device with an integrated eCompass/Gyro. In addition to accurate and reliable location, benefit from stable and smooth chartplotting, accurate course over ground at any speed, and the ability to precisely overlay radar on charts.*

Connect to a Simrad NSS, NSE or NSO navigation system with ease and select your GS25 information from any connected display.

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



Mounting [S,F,B] Flush mount / Standar Pole Mount
Operating Temperature -25°C to +60°C
Waterproof Standard/rating IPX6,7
Product Width 90mm
Product Height 133mm
Product Weight 130g


Humidity Range [rh] 40 deg C, 93%RH, operating


Power Consumption < than 2w
Power Supply (Supply Voltage) 9v-18vDC
Reverse Polarity Protection Yes

GPS Navigation

GPS Position Accuracy [m] 5
GPS Receiver Channels 32
Horizontal Accuracy 5 m
Rate of Turn 3 degrees
Receiver Type L1, C/A code, 1.575 GHz Frequency - L2 C/A code, 1.602 GHz Frequency
Satellite Reacquisition 5 sec

Networking Connectors

Connectors NMEA 2000 Micro C