B953 Class B AIS Transceiver - 5W SOTDMA with VHF Antenna Splitter
**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 B953 is a high transmit power (5W SOTDMA) AIS Class B transceiver that is small, and lightweight, 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 B953 has an integrated VHF antenna splitter which enables the transceiver to share your existing VHF antenna without any loss of performance. With built-in intelligent connectivity, integrated next-generation GPS receiver antenna, and a unique FLEXI-FIT bracket system, safe and secure installation is simple.
Features:
- Certified AIS Class B 5W SOTDMA
- Integrated VHF antenna splitter
- 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
- Guaranteed connectivity and interoperability with any chart plotter or PC
- 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
- Fail-safe VHF radio operation
Physical Environmental Specifications:
- Size (H x W x D): 150 x 115 x 45mm
- Weight: 415kg
- 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): 245mA
- Peak current: 2.5A
- Average power consumption (at 12V): 2.9W
- 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 62287-2 Ed. 2, 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 VHF radio accessory cable
- 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 B953 is a compact and lightweight AIS Class B transceiver designed for reliable vessel tracking and safety communication. It features a powerful 5W SOTDMA transmission, enabling you to detect and be detected by more AIS targets at maximum range while maintaining low power consumption. Its integrated VHF antenna splitter allows seamless sharing of your existing VHF antenna without any performance loss, making installation straightforward and efficient. The built-in GPS receiver provides accurate positioning data, with support for multiple GNSS systems including GPS, GLONASS, BeiDou, and Galileo, ensuring quick and precise location fixes even from a cold start in approximately 26 seconds. This device complies with international standards such as IEC 62287-2 and ITU-R M.1371.5, and is certified for use in the US, Canada, and Europe, including US Coast Guard requirements. Its rugged IPx6 and IPx7 ratings guarantee water, pressure spray, and damp proof performance, suitable for challenging marine environments. The B953’s design features a FLEXI-FIT bracket system for easy installation, protected against vibration, shock, and extreme temperatures, making it ideal for a variety of vessel types. Connectivity options include NMEA 0183, NMEA 2000, and USB interfaces, providing seamless integration with chart plotters and PC systems for real-time data sharing and monitoring. The transceiver also incorporates intelligent health and performance monitoring, a silent mode for transmit-off operation, and built-in surge protection for enhanced reliability. Its small footprint and low power consumption make it suitable for space-constrained installations, while its multiple data interfaces ensure compatibility with existing marine electronics. The package includes the transceiver, power and data cable, accessory cable, FLEXI-FIT mounting bracket, screws, and optional fixing tape. Whether outfitting a commercial vessel or a recreational boat, the em-trak B953 delivers high-performance AIS capabilities with easy installation and reliable operation in demanding marine conditions.
Features:
- Certified AIS Class B 5W SOTDMA for reliable vessel identification
- Integrated VHF antenna splitter for seamless antenna sharing
- Global certification including USCG, FCC, Canada, and Europe standards
- Advanced SRT-AIS transceiver engine for superior performance
- FLEXI-FIT bracket system for quick and secure mounting
- Built-in high-performance GPS receiver supporting multiple GNSS systems
- Rugged IPx6 and IPx7 waterproof design for marine environments
- Compact and lightweight construction for space-saving installation
- Ultra-low power consumption for efficient operation
- Guaranteed interoperability with chart plotters and PCs via NMEA 0183, NMEA 2000, and USB
- Automated health and performance monitoring
- Silent mode (transmit-off) for versatile operation
- Enhanced RF shielding against electromagnetic interference
- Built-in surge protection for electrical safety
- Fail-safe VHF radio operation ensuring continuous connectivity
