B951 Class B AIS Transceiver - 5W SOTDMA

**As the FCC requires all units sold in the US to be programmed by a qualified technician. Please submit the form below for programming at the time of purchase. A copy of the MMSI registration or FCC Ship Station License is required along with the vessel master or owner's signature on the completed programming form.**

Click here to download form.

The B951 is a high-power (5W SOTDMA) Class B transceiver, delivering advanced performance and ultimate reliability through em-trak's next-gen technology. Small and durable, this trusted transceiver processes all AIS transmissions in real-time, with increased range and transmission priority so you always have the complete picture and the time to respond, even in the busiest waters.

em-trak's flexible, intelligent connectivity means the B951 can be paired to any chart-plotter and its next-gen GPS receiver and the antenna are already integrated inside the device to provide best-in-class, ultra-low power consumption, and performance. em-trak's unique FLEXI-FIT® bracket system completes the package and ensures easy installation.

Features:

Certified AIS Class B – 5W SOTDMA
Global certification - USCG / FCC / Canada / Europe
SRT-AIS™ Transceiver Engine for superlative proven performance
FLEXI-FIT™ bracket system for easy, convenient, and secure installation
Internal high-performance GPS receiver and antenna (external antenna optional)
Water, pressure spray, and damp proof (IPx6, IPx7 certified)
Protected from vibration, shock, and extreme temperatures
Small and lightweight
Ultra-low power consumption – best in class
NMEA 0183 & NMEA 2000
Automated health and performance monitoring
Silent mode (transmit-off) function
Enhanced RF screening to protect against electromagnetic interference
Built-in power surge protection

Physical & Environmental Specifications:

Size (H x W x D): 150 x 115 x 45mm
Weight: 375kg
Operating temperature: -25°C to +55°C
Storage temperature: -25°C to +70°C
Ingress protection: IPx6 and IPx7

Electrical Specifications:

Supply voltage: 12V or 24V DC
Supply voltage range: 9.6V - 31.2V DC
Average current (at 12V): 135mA
Peak current: 2.5A
Average power consumption (at 12V): 1.6W
Galvanic isolation: NMEA 0183 inputs only, NMEA 2000, VHF antenna port

Connectors:

VHF antenna: SO-239
GNSS: TNC
Power: 12-way circular multipole
NMEA 2000: 5-way Micro-C connector
USB: USB Micro-B

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

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

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 the cold start: 26s

VHF Transceiver:

VDL access scheme: SOTDMA
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: 5W (+37dBm)

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

Specifications:

AIS Class: B
Antenna Included: Yes
Display Included: No
Function: Receive/Transmit
GPS Included: Yes
Box Dimensions: 6"H x 7"W x 7"L WT: 2 lbs
UPC: 672975210540

Quick Guide (pdf)
Brochure (pdf)

em-trak B951 Class B AIS Transceiver - 5W SOTDMA [430-0009]