Description
B921 2W CSTDMA Class B AIS Transceiver
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 em-trak B921 is a 2W CSTDMA Class B AIS transceiver, delivering em-trak’s advanced performance and reliability through next-gen technology. Small and durable, this trusted transceiver processes all AIS transmissions in real-time, even at the range limit, so you always have the complete picture and the time to respond.
em-trak’s intelligent connectivity means the B921 can be connected to any chartplotter and comes equipped with integrated GPS technology and best-in-class, ultra-low power consumption. Installation is also simplified with the unique FLEXI-FIT bracket system to have you up and running in no time at all.
Certified AIS Class B 2W CSTDMA
Global certificationUSCG / 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
Best-in-class, ultra-low power consumption
NMEA 0183 and 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 and Environmental Specifications
Size: 5.9″H x 4.5″W x 1.8″D
Weight: 0.8 lbs.
Ingress Protection: IPx6 and IPx7
Electrical Specifications
Supply Voltage: 12V or 24V DC
Supply Voltage Range: 9.6V – 31.2V DC
Average Current @ 12V: 135mA
Peak Current: 2A
Average Power Consumption @ 12V: 1.6W
Galvanic Isolation: NMEA 0183, 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
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
Time to First Fix from the Cold Start: 26s
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)
User Interface
Indicators: Power, transmit timeout, error, silent mode
In the Box
AIS Transceiver
Power and Data Cable
FLEXI-FIT Mounting Bracket
Screws and Optional Fixing Tape
