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: -25C to +55C
- Storage temperature: -25C to +70C
- 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
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
The em-trak B951 is a high-performance Class B AIS transceiver designed for reliable vessel tracking and communication in busy maritime environments. Featuring a 5W SOTDMA transmission power, this durable and compact device processes all AIS signals in real-time, providing increased range and transmission priority to ensure you always have a complete picture of nearby vessels. Its integrated GPS receiver and antenna deliver precise positioning data, while the flexible connectivity options allow seamless integration with various chartplotters and onboard systems.
Built to meet global certification standards including USCG, FCC, Canada, and Europe, the B951 is engineered for maximum reliability and safety. Its IPx6 and IPx7 ratings protect against water, pressure spray, and humidity, making it suitable for harsh marine conditions. The device's design emphasizes low power consumption and minimal electromagnetic interference, ensuring efficient operation without draining vessel power supplies. The included FLEXI-FIT mounting system simplifies installation with a secure and adjustable bracket, making it suitable for a wide range of vessel types.
Advanced features such as automated health monitoring, silent mode, and built-in surge protection enhance operational safety and ease of maintenance. The B951 supports multiple data interfaces including NMEA 0183 and NMEA 2000, providing compatibility with most marine electronics. Its robust construction and comprehensive safety standards make it a dependable choice for commercial and recreational vessels seeking reliable AIS performance. Whether installed on a small boat or a large vessel, the B951 offers superior performance, easy setup, and long-term durability, ensuring safe navigation and effective collision avoidance in all maritime conditions.
Features:
- Certified AIS Class B 5W SOTDMA for reliable vessel tracking
- Global certification including USCG, FCC, Canada, and Europe standards
- SRT-AIS Transceiver Engine ensures high performance and proven reliability
- FLEXI-FIT bracket system for quick, secure, and flexible installation
- Internal high-performance GPS receiver with optional external antenna
- Water, pressure spray, and damp proof (IPx6, IPx7 certified)
- Protected against vibration, shock, and extreme temperatures
- Compact and lightweight design for space-saving installation
- Ultra-low power consumption for energy-efficient operation
- Supports NMEA 0183 and NMEA 2000 interfaces for versatile connectivity
- Automated health and performance monitoring for maintenance ease
- Silent mode (transmit-off) for operational flexibility
- Enhanced RF screening to prevent electromagnetic interference
- Built-in surge protection for electrical safety
