B400 SERIESClass B

The B400 is a fully integrated high-powered priority transmit AIS Class B transceiver that delivers enhanced range and performance in busy areas and open ocean.

A single integrated and small unit which is certified weather and water proof, with integrated colour display, the B400 is easy to install, use, and integrate with all bridge systems as well as offering a full range of sophisticated AIS functionality such as alerts, target filters, vessel information lists, real time weather and more.


Global next day shipping

  • Features

    • Certified high powered AIS Class B (5W SOTDMA)
    • High Performance latest generation GPS
    • Ruggedized and impervious to extreme environments – water (IP67), damp, shock, vibration, temperatures.
    • Suitable internal or permeant external installation
    • Robust ergonomic button and rotary-knob user interfaces with configurable multi-lingual menu options
    • Integrated high definition colour display with night mode
    • ENC chart (C-MAP) with configurable AIS target overlay
    • Multiple Functionality – Collision, CPA, MOB, SAR, Vessel Lists, Text Messaging, Weather, Active Monitoring, Silent Mode, plus much more
    • Professional live AIS AtoN information display
    • Plug & Play Connectivity – Integrated WiFi, NMEA0183 & NMEA2000
    • Enhanced RF screening to protect against electromagnetic interference
    • Built-in power surge protection
  • Technical Specification

    Size 152mm x 165mm x 112mm
    Weight 1.5kg


    Power Supply 12-24VDC
    Power Consumption <12W


    Physical Data Interfaces
    NMEA0183 input only – 3
    NMEA0183 bi-directional – 3
    NMEA0183 (IEC61162-2) bi-directional ports – 3
    NMEA0183 (IEC61162-1) bi-directional ports – 3
    DGPS correction data input(ITU-R M.823-2) – 1
    Alarm relay output – 1
    NMEA2000 – 1
    WiFi Type – 802.11 b/g/n
    USB – Optional cable can be purchased (connected to 18 pin connector)


    AIS Standards – IEC62287-2 Ed 1.0
    Serial Data Interface – IEC61162-1 Ed 4.0
    Environmental Standard – IEC60945 Ed 4.0
    GPS Performance – IEC61108-1 Ed 2.0
    Product Safety Standards – IEC60945 Ed 4.0

    Transmitter – 1
    Receiver – 3
    Operating Frequency Range – 156.025 to 162.025MHz in 25kHz steps
    Output Power – 5W
    Channel Bandwidth – 25kHz
    Modulation Modes – 25kHz
    Bit Rate – 9600bits/sec
    AIS Receiver Sensitivity – <-107dBm @ 20% PER


    Channels – 72
    GNSS  Type & Performance – GPS/Galileo + GLONASS or BEIDOU


    Water Proofing – IPx6, IPx7
    IEC 60945 – Protected Category
    Operating Temperature – -15°C to +55°C


    5” 800 x 480 full colour LCD display
    Rotary encoder for selection and entry
    Four menu keys and four direction keys
    Micro SD card for software updates and charts


    FCC, Industry Canada,
    CE under Radio Equipment Directive (red) for Europe
    Marine Equipment Directive (med) Compliant
    IEC Class B ‘CS’ AIS Standard IEC62287-1 (Edition 2)

  • In The Box

    • 1 X AIS Transceiver
    • 1 X Mounting Bracket And Fixings Pack
    • I X Power Cable
    • 1 X Data Accessory Cable
    • 1 X GPS Antenna
  • Global Support & Warranty Service

    With em-trak you can buy with confidence. If you are unhappy with your new product for any reason, within two days of receipt and subject to the product and packaging being complete and undamaged, you may return it to us for a full refund.


    We are sorry, but we cannot accept the return of any product if you have not advised us in writing within 48 hours of receiving your em-trak product, or if it has been used and or damaged or if any of the package is incomplete. All em-trak products benefit from our three year global warranty.


    In the unlikely event of a problem, please contact our Customer Support department (24/7) at [email protected] and one of our experts will work with you to instantly resolve your issue or arrange the repair or replacement of your em-trak product. The warranty is invalidated if the product has been incorrectly used, damaged or tampered.

  • Manuals & Downloads

Core technology


Core technology continuously developed and proven over many years guarantees you the very best AIS receive and transmit and GPS performance, coupled with the lowest power consumption of any comparable AIS transceiver.



Quality engineered and manufactured with the best components to provide years of continuous, maintenance free operation in even the most extreme environments – impervious and protected against the long-term effects of water, damp, shock, vibration and extreme cold and heat.



Guaranteed connectivity to any chart-plotter and PC/Phone/Tablet/Watch and navigation app. This ensures you are not limited to any display device or navigation application now or in the future and can maximise AIS related functionality such as weather, MOB, anti-collision, anchor safety, vessel tracking and more.  



With features such as FLEXI-FIT bracket, integrated GPS antenna, VHF antenna splitter and unlimited connectivity options such as NMEA2000 & 0183, Bluetooth & Wifi. em-trak AIS transceivers are easy to configure and install on any boat.  



em-trak transceivers are rigorously tested and certified for global regulatory compliance. This includes FCC, USCG, Canada and EU test and certification.


Warranty & support

em-trak transceivers are designed and engineered for a life time of reliable operation in even the most extreme environments. This is supported by our best in class global warranty program with 24/7 customer support