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Em-trak Class B AIS Transceiver B953 + Integrated VHF splitter

Em-trak Class B AIS transceiver : B953

The AIS Class B B953 is the next generation high power (5W SOTDMA) class B transceiver, fully integrated with built in VHF antenna splitter and integrated GPS antenna.

The B953 is a complete high power 5W SOTDMA Class B transceiver.  Built into the rugged enclosure is a VHF antenna splitter meaning you can share your single VHF antenna with the AIS and VHF radio. 

It's high power 5W transmit power provides increased range and reporting frequency, ideal for offshore sailors or those sailing in busy transmit areas.  Standard Class B AIS transceivers only transmit at 2W meaning less range.  These units also transmit using the SOTDMA method, like Class A commercial units, this means a faster update frequency than class B units and ensures you are always seen! The unit is even compatible with satellite AIS systems.

The B953 em-trak AIS transceiver includes both NMEA0183 and NMEA2000 interfaces so it is ready and able to be connected to all chartplotters.  The B953 includes stealth (silent) mode functionality also, allowing it to continually receive AIS messages, but not transmit.  We have a dash mounted AIS silent mode switch available as an accessory item.  

The em-trak B953 Class B AIS transceiver has a built in GPS antenna which reduces install time and does not require the installation of another GPS antenna.  The Em-trak B953 does still include the ability to add an external GPS antenna if desired or required.

Brochure button  UserManual button  $1025 inc GST 

Product Overview

•  Rugged and Robust •  Flexi-Fit mounting bracket for easy installation
•  SOTDMA Class B providing increased range and reporting frequency •  5W transmit power (instead of standard 2W)
•  Integrated VHF antenna splitter •  Ready for connection to your chartplotter via NMEA0183 or NMEA2000
• Built in surge protection  • Internal GPS antenna


• Global 3 year warranty

Don't have an MMSI yet?  Download the application form here, its free to apply.

Looking for more information, or ready to buy? Contact us.


Not sure if your charplotter is compatible? Contact us to discuss your options.
For support and other associated downloads for the B953 please visit our FAQ


All em-trak products come with a comprehensive 3 year warranty. If you are having problems with your em-trak AIS hardware please visit our FAQ  first and then if you still require assistance, contact us for assistance.