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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.




  • 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 permanent 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




  • 1 X AIS Transceiver
  • 1 X Mounting Bracket And Fixings Pack
  • I X Power Cable
  • 1 X Data Accessory Cable
  • 1 X GPS Antenna




Size (w x h x d) – 152 x 165 x 95mm
Weight – 1.1kg
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) – 480mA
Peak current – 4A
Average power consumption (at 12V) – 5.8W
Galvanic isolation – NMEA 0183, NMEA 2000, Power supply, VHF antenna port


VHF antenna – SO-239
Power – 2 way circular multipole
NMEA 0183/silent mode – 14 way circular multipole
NMEA 0183/alarm relay – 18 way circular multipole
NMEA 2000 – 5 way Micro-C connector


NMEA 0183 – 3 x input ports. 3 x bi-directional ports
NMEA 2000 – NMEA 2000 Ed 3.101, LEN=1
Wi-Fi – IEEE 802.11 (a/b/g), client and access point mode supported (5 connections in access point mode)

AIS standards – IEC 62287-2 Ed. 2.  ITU-R M.1371.5
Product safety standards – EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013
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 – External only
Time to first fix from cold start – 26s


VDL access scheme – SOTDMA
Operating frequency – 156.025MHz – 162.025MHz
Channel bandwidth – 25kHz
Receivers/transmitters – 3 x receivers, 1 x transmitter
AIS receiver sensitivity (20% PER) – -111dBm
AIS transmitter power – 5W (+37dBm)


Screen – 5″ 800 x 480 full colour LCD
Buttons – Rotary encoder for selection and entry, 4 menu keys and 4 direction keys
SD card interface – Micro SD card interface for logging and chart cards (not available from em-trak)


Size –  85 x 70mm
Weight – 470g
Ingress protection – IPx6 and IPx7
Mounting – 1 inch 14 TPI pole mount required
GNSS systems supported – GPS, GLONASS, Galileo, BeiDou

B400 SERIES - Class B

SKU: B400
  • All orders are processed within 2-3 business days. Orders are not shipped or delivered on weekends or holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.

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