Always Free Shipping—No Minimum Order · Contiguous U.S. orders only. Alaska and Hawaii excluded.
Shipping & Delivery
Always Free Shipping—No Minimum Order Contiguous U.S. orders only. Alaska and Hawaii excluded.
Returns & Refunds
Eligible items may be returned within 30 days of delivery. Items must be new, unused, uninstalled, and in original packaging. An RMA is required.
Installment options at checkout are provided by Shop Pay and its partners and are subject to eligibility. Options depend on your purchase amount and may require a credit check by the financing partner. Terms, rates, and eligibility are determined by the financing partner. For details, see the Shop Pay Installments terms during checkout.
B921 Class B AIS Transceiver - 2W CSTDMA
**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.**
The 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 chart-plotter and comes equipped with integrated GPS technology and best-in-class, ultra-low power consumption. Installation is also simplified with our unique FLEXI-FIT bracket system to have you up and running in no time at all.
Features:
Certified AIS Class B 2W CSTDMA
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: 2A
Average power consumption (at 12V): 1.6W
Galvanic isolation: NMEA 0183, NMEA 2000, VHF antenna port
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
em-trak B921 Class B AIS Transceiver, 2W CSTDMA
The em-trak B921 is a compact, durable Class B AIS transceiver designed for boat owners and marine operators who need dependable vessel tracking and situational awareness. Its 2W CSTDMA technology processes AIS transmissions in real time, including signals near the range limit, helping connected navigation equipment display the information needed to assess surrounding traffic.
Built-in GPS technology and intelligent connectivity allow the B921 to connect with compatible chart plotters through NMEA 0183 or NMEA 2000 interfaces. The FLEXI-FIT mounting bracket simplifies installation, while ultra-low power consumption supports efficient operation aboard vessels using 12V or 24V DC electrical systems. The unit also includes silent mode for transmit-off operation, automated health and performance monitoring, electromagnetic interference screening, and built-in power surge protection.
FCC programming requirement: The FCC requires all units sold in the United States to be programmed by a qualified technician. A completed programming form, a copy of the MMSI registration or FCC Ship Station License, and the vessel master or owner's signature are required. Download the programming form.
Key Features
Certified Class B AIS: 2W CSTDMA transceiver technology processes AIS transmissions in real time.
Integrated GNSS: Internal GPS receiver and antenna support GPS, GLONASS, BeiDou, and Galileo systems; an optional external antenna is supported.
Marine connectivity: NMEA 0183, NMEA 2000, and USB interfaces connect the transceiver with compatible navigation and PC equipment.
Installation-ready design: FLEXI-FIT mounting bracket provides a convenient and secure installation method.
Durable construction: IPX6 and IPX7 protection, plus resistance to vibration, shock, and extreme temperatures, supports marine installation.
Efficient operation: Ultra-low power consumption and 12V or 24V DC compatibility suit a range of vessel electrical systems.
Product Details
Brand: em-trak
Part number: 430-0001
AIS class: Class B CSTDMA
AIS transmitter power: 2W
Power input: 12V or 24V DC; allowable range 9.6V–31.2V DC
Interfaces: Two bi-directional NMEA 0183 ports, NMEA 2000, and USB Micro-B virtual COM port
VHF antenna connector: SO-239
GNSS connector: TNC
Ingress protection: IPX6 and IPX7
Operating temperature: -13°F to 131°F
Storage temperature: -13°F to 158°F
Included: AIS transceiver, 6.6-foot power and data cable, FLEXI-FIT mounting bracket, screws, and optional fixing tape
Choose the em-trak B921 Class B AIS Transceiver for compact, connected AIS performance and straightforward installation aboard your vessel.
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
California Proposition 65 Warning
[APPROVED PROP 65 WARNING REQUIRED]
SEO Meta Description: Shop the em-trak B921 Class B AIS transceiver with 2W CSTDMA, integrated GNSS, NMEA connectivity, and efficient marine installation.
It worked as is described and it got my uncle‘s fridge back up and running perfectly
Norcold Gas Control
Dennis Johnsen
The Trident Marin Extra Flex Corrugated Wet Exhaust hose works great. I had to replace the old hose coming from the generator muffler to the exhaust pipe going out the hull. The hose needed to be curved and the flex was perfect. Delivery was fast with no issues. Thank you
Trident Marine 2" Extra-Flex Corrugated Marine Wet Exhaust Hose - Sold by the Foot
James Cline
Very pleased with that product
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware
Gerald
As discribed. Brand new in excellent shape, fast delivery, well made and an awesome price. Super job thanks a million!
The Trident Marin Extra Flex Corrugated Wet Exhaust hose works great. I had to replace the old hose coming from the generator muffler to the exhaust pipe going out the hull. The hose needed to be curved and the flex was perfect. Delivery was fast with no issues. Thank you
J
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware James Cline
I ordered my product August 30! I have yet to receive it! My shipping cost was over ten dollars ! I could of walked there and picked it up,it would have been faster!
No option for zero stars. I ordered a roll of 6 awg duplex wire and they drop shipped me a cheap, completely unrelated item. Nobody answers emails or the phone.
