em-trak B953 Class B AIS Transceiver, 5W SOTDMA with VHF Antenna Splitter, Part Number 430-0013

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

em-trak B953 Class B AIS Transceiver delivers 5-watt SOTDMA transmission, reliable AIS target tracking, and flexible connectivity for recreational and commercial vessels. Designed for boaters who want to improve vessel visibility and access more AIS information, the B953 combines a compact transceiver with an integrated VHF antenna splitter, allowing it to share an existing VHF antenna without loss of performance.

The B953 includes an internal high-performance GPS receiver and antenna, with support for an optional external antenna. Its FLEXI-FIT mounting bracket helps simplify secure installation, while NMEA 0183, NMEA 2000, and USB connectivity support integration with compatible chart plotters and PCs. Automated health monitoring, silent mode, built-in power surge protection, enhanced RF screening, and fail-safe VHF radio operation provide practical functionality for marine electronics installations.

Built for demanding marine environments, the em-trak B953 is water, pressure-spray, and damp proof with IPx6 and IPx7 protection. It is designed to withstand vibration, shock, and extreme temperatures while maintaining low power consumption. FCC requirements state that units sold in the United States must be programmed by a qualified technician. Programming requires the completed form, a copy of the MMSI registration or FCC Ship Station License, and the vessel master’s or owner’s signature.

Click here to download the programming form.

Key Features:

• Certified AIS Class B transceiver with 5-watt SOTDMA transmission for AIS communication and vessel tracking.
• Integrated VHF antenna splitter allows the transceiver to share an existing VHF antenna.
• Internal GPS receiver and antenna support positioning data, with an optional external antenna connection.
• NMEA 0183, NMEA 2000, and USB interfaces support connection to compatible chart plotters and PCs.
• IPx6 and IPx7 protection helps the unit withstand water, pressure spray, and damp conditions.
• FLEXI-FIT mounting bracket supports convenient and secure installation.

Product Details:

• Brand: em-trak
• Model: B953
• Part number: 430-0013
• AIS class: Class B
• VDL access scheme: SOTDMA
• AIS transmitter power: 5 watts
• Supply voltage: 12 or 24 volts DC
• Supply voltage range: 9.6–31.2 volts DC
• VHF frequency range: 156.025–162.025 MHz
• Connectivity: NMEA 0183, NMEA 2000, and USB
• GNSS support: GPS, GLONASS, BeiDou, and Galileo
• Operating temperature: -13°F to 131°F
• Storage temperature: -13°F to 158°F
• Ingress protection: IPx6 and IPx7
• Included: AIS transceiver, power and data cable, VHF radio accessory cable, FLEXI-FIT mounting bracket, screws, and optional fixing tape

Choose the em-trak B953 for compact AIS Class B performance, integrated antenna sharing, and versatile marine electronics connectivity.