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B900 series

B900

The B900 series delivers market-leading AIS performance in a compact, rugged design. It is lightweight, durable, and easy to find and install, with reliable connectivity to keep you visible, informed and in control.

Transmit Power Output

Optional Extras

£494.00 Ex. VAT
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Features at a glance

Transmit & Receive
WiFi
12W/SO
NMEA0183 & 2000

Built for the real world 

The B900 series is a versatile range of AIS transceivers designed to fit seamlessly into any vessel, from compact leisure craft to serious offshore cruisers. Using em-trak’s core technology and built for real-world conditions, the B900 Series delivers consistently strong AIS performance, giving you a complete picture of your surroundings, inshore or offshore. 

Every model in the B900 range is built with integrated high-performance GPS, FLEXI-FITâ„¢ bracket mounting, and ultra-low power consumption. With a focus on reliability, ease of use, and global compliance, the B900 Series offers the trusted AIS functionality you need, with models to suit every budget and application. 

AIS SOLUTIONS

Smart AIS performance

The B900 series combines 2W CSTDMA Class B AIS with em-trak’s advanced RF filtering and internal surge protection for interference-free, reliable operation, even on busy waterways. Automated health monitoring ensures continuous performance, while silent mode enables…

Compare B900 series models

Choose the model that fits your vessel, budget, and onboard setup.

Our most affordable transceiver

The B921 model is the most affordable out of the AIS Transceivers in the B900 series. It offers reliable standard power performance and essential connectivity, perfect for smaller vessels. 

Additional features

AIS Class B (2W CSTDMA)

Certified AIS transmission for global recreational and light commercial use. 

Global certification

Fully approved for use in the US, Canada, Europe and more, including USCG and FCC.

Built-in GPS

High-performance integrated GPS receiver and antenna (external antenna optional).

Ultra-low power consumption

Efficient operation for smaller boats or extended cruising. 

Silent mode

Transmit-off mode for discretion without losing AIS reception.

EMI protection

Enhanced RF screening to prevent interference from other onboard electronics.

Surge protection

Built-in shielding safeguards against power spikes and voltage irregularities. 

Self-monitoring system

Automatic health performance checks for continuous reliability. 

Why em-trak?

We guarantee you best performance, reliability, connectivity and value. Achieved through relentless and sustained core technology and product development over a twenty-year period.
Enhance the safety of you and your vessel with connected em-trak AIS onboard.

Tech Spec

Em-trak products are designed and engineered to deliver the very best performance, reliability, connectivity and installation experience for those who are serious about wanting an AIS transceiver that delivers the best real-world performance and long-term reliability.

PHYSICAL AND ENVIRONMENTAL SPECIFICATION

Size (w x h x d) – 150 x 115 x 45mm
Weight – 375g
Operating temperature – -25°C to +55°C
Storage temperature – -25°C to +70°C
Ingress protection – IPx6 and IPx7

STANDARDS COMPLIANCE

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

ELECTRICAL SPECIFICATION

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

GNSS

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

CONNECTORS

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

VHF TRANSCEIVER

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)

DATA INTERFACES

NMEA 0183 – 2 x bi-directional ports
NMEA 2000 – NMEA 2000 Ed 3.101, LEN=1
USB – PC virtual com port for NMEA 0183 data

USER INTERFACE

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

Global support & warranty

All em-trak products are supplied with a comprehensive three-year global warranty for complete peace of mind.

Customers may return unused products for a full refund within 48 hours of receipt, provided the product and packaging are complete, undamaged, and notification is received in writing within this timeframe. Returns cannot be accepted if the product has been used, damaged, or if any packaging components are missing.

In the unlikely event of a fault, em-trak’s Customer Support team is available 24/7 at support@em-trak.com. Our specialists will assist in diagnosing the issue and, where appropriate, arrange repair or replacement under warranty. Please note that the warranty does not cover products that have been misused, damaged through improper handling, or tampered with.

Manuals & downloads

Em-trak products are designed and engineered to deliver the very best performance, reliability, connectivity and installation experience for those who are serious about wanting an AIS transceiver that delivers the best real-world performance and long-term reliability.