em-trak B922 Class B AIS Transceiver 2W/CS

The B922 is a standard power (2W CSTDMA) AIS Class B transceiver that is small, light-weight, yet delivers the very best AIS receive and transmit performance so you see more AIS information and targets at maximum range – all achieved with the least power consumption.

The B922 combines WiFi & Bluetooth for seamless wireless connectivity and AIS data streaming to any mobile device or PC. Your transceiver comes with CONNECT-AIS – your programming, configuration and transceiver health monitoring app which can be easily downloaded from either the iOS Apple Store or Google Play. The B922 is engineered with the most advanced core technology to deliver the very best AIS data and information, enabling it to be used by up to 9 different devices simultaneously.

All of this is delivered within a compact, easy to install, rugged package designed and manufactured to operate reliably without maintenance in harsh marine environments.

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em-trak B922 Class B AIS Transceiver 2W/CS





  • Certified AIS Class B – 2W CSTDMA
  • Plug & play connectivity – WiFi & Bluetooth
  • Global Certification – USCG / FCC / Canada / Europe
  • SRT-AIS™ transceiver engine for superlative proven performance
  • FLEXI-FIT™ bracket system for easy, convenient and secure installation
  • Integrated high-performance GPS receiver & antenna (external antenna optional)
  • Water, pressure spray and damp proof – IPx6 & IPx7
  • Ruggedized – protected from vibration, shock and extreme temperatures
  • Small and lightweight
  • Ultra-low power consumption – best in class
  • Guaranteed connectivity and interoperability with any app, chart plotter, smart phone, tablet or PC
  • NMEA0183 & NMEA2000
  • Automated health and performance monitoring
  • Silent Mode (transmit-off) function
  • Enhanced RF screening to protect against electromagnetic interference
  • Built-in power surge protection

Tech Specifications

    Size (w x h x d) – 150 x 115 x 45mm
    Weight – 385g
    Operating temperature – -25°C to +55°C
    Storage temperature – -25°C to +70°C
    Ingress protection – IPx6 and IPx7


    Supply voltage – 12V or 24V DC
    Supply voltage range – 9.6V – 31.2V DC
    Average current (at 12V) – 170mA
    Average current (at 12V) (wireless off) – 135mA
    Peak current – 2A
    Average power consumption (at 12V) – 2.0W
    Average power consumption (at 12V) (wireless off) – 1.6W
    Galvanic isolation – NMEA 0183 inputs only, NMEA 2000, VHF antenna port


    VHF antenna – SO-239
    GNSS – TNC
    Power/NMEA 0183/silent mode – 12 way circular multipole
    NMEA 2000 – 5 way Micro-C connector
    USB – USB Micro-B


    NMEA 0183 – 2 x bi-directional ports
    NMEA 2000 – NMEA 2000 Ed 3.101, LEN=1
    USB – PC virtual com port for NMEA0183 data
    Wi-Fi – IEEE 802.11 (a/b/g), client and access point mode supported (2 connections in access point mode)
    Bluetooth – BT Classic 4.0, 7 concurrent connections

    AIS standards – IEC 62287-1 Ed. 3.  ITU-R M.1371.5
    Product safety standards – EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013 EN62311:2008
    Environmental standards – IEC 60945 Ed. 4
    Serial data interface standards – IEC 61162-1 Ed 5.0.  IEC 61162-2 Ed 1.0
    NMEA 2000 – NMEA 2000 Ed 3.101
    GNSS performance standards – IEC 61108-1 Ed 2.0. IEC 61108-02 Ed 1.0


    Systems supported – GPS, GLONASS, BeiDou, Galileo
    (two of any combination, three including GPS, Galileo)
    Channels – 72
    Internal/external antenna – Internal or optional external antenna
    Time to first fix from cold start – 26s


    VDL access scheme – CSTDMA
    Operating frequency – 156.025MHz – 162.025MHz
    Channel bandwidth – 25kHz
    Receivers/transmitters – 2 x receivers, 1 x transmitter
    AIS receiver sensitivity (20% PER) – -111dBm
    AIS transmitter power – 2W (+33dBm)


    Indicators – Power, transmit timeout, error, silent mode

In the Box

1 x AIS Transceiver

1 x Power and Data Cable (2m)

1 x FLEXI-FIT Mounting Bracket – Complete with Screws & Optional Fixing Tape