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Em-trak Class B AIS Transceiver / Transponder : B400

Em-trak Class B AIS transponder : B400

The Em-trak B400 Class B AIS transponder is a waterproof AIS Class B transceiver in a standalone unit. Featuring built in Wi-Fi, 5W output power and more.

The em-trak B400 AIS Class B transceiver is a weather and waterproof AIS standalone unit designed for external mounting.  It includes a chartplotting display utilising C-MAP cartography and also boasts both NMEA0183 and NMEA2000 interfaces for easy connection to your chartplotter and even includes built in long range Wi-Fi.

Unlike other Class B AIS units on the market, the B400 includes 5W of transmit power (standard is 2W) and utilising the more reliable SOTDMA protocol which ensures you are always seen.

The Em-trak B400 AIS has a built in Wi-Fi antennas for long range connectivity.

The B400 comes with all the software required to easily program with your boat's MMSI, Call sign, name and dimensions, or you can have your dealer program it for you.

Brochure button  UserManual button  

Product Overview

•  Weather & waterproof •  Highest quality, designed to last
•  C-MAP ENC cartography •  MOB alert and track mode
•  5W output power •  Connect via NMEA0183, NMEA2000 or Wi-Fi
•  Long range Wi-Fi built in •  External GPS antenna

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 B400 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.