em-trak B954 Class B AIS Transceiver – 5W SOTDMA w/WiFi, Bluetooth, & VHF Antenna Splitter

Description

Combine higher-power Class B AIS, wireless data sharing, and shared VHF-antenna capability with the em-trak B954. Its 5W SOTDMA transmitter, integrated VHF antenna splitter, GPS/GLONASS receiver, Wi-Fi, and Bluetooth simplify installations that need AIS target information on an MFD as well as a tablet, phone, or computer. Need stronger Class B AIS output without adding a separate antenna? The B954 supports NMEA 2000, dual NMEA 0183 ports, USB, and mobile connectivity in a compact IP67-rated enclosure.

Key Specifications

• em-trak B954 Class B AIS transceiver with Wi-Fi, Bluetooth, and integrated VHF antenna splitter, model 421-0006.
• 5W Class B SOTDMA AIS transmit-and-receive capability.
• Dual-channel AIS operation across 156.025–162.025 MHz.
• Integrated VHF antenna splitter for compatible shared VHF radio and AIS antenna installations.
• Integrated DSC watch receiver.
• High-performance internal GPS/GLONASS receiver.
• NMEA 2000, dual NMEA 0183, USB, Wi-Fi, and Bluetooth connectivity.
• Multi-color LED status indicators; no built-in chartplotter display.
• 9.6V–31.2V DC input with approximately 2W average power consumption.
• IP67 protection, operating range of -13°F to 131°F (-25°C to 55°C), and approximately 1.0 lb (0.45 kg) weight.

Integration

The B954 requires a compatible VHF radio, a suitable shared VHF antenna, valid MMSI/static vessel data, and an MFD, chartplotter, computer, or mobile app to view AIS targets. It is not a VHF voice radio, radar, chartplotter, EPIRB, or collision-avoidance guarantee.

The integrated splitter reduces the need for a separate AIS antenna, but all antenna, VHF radio, and AIS connections must follow the manufacturer wiring diagram. Class B SOTDMA offers higher output and more structured time-slot access than standard 2W CSTDMA equipment, but AIS performance still depends on VHF coverage and accurate data from other transmitters.

Installation Notes

Install the unit in a dry, accessible location. Connect the shared VHF antenna, VHF radio, and AIS ports exactly as specified. Keep RF cables secure and away from high-current wiring, position any required external GPS antenna with clear sky view, and configure NMEA, USB, Wi-Fi, and Bluetooth connections for the desired devices.

Use a properly fused 9.6V–31.2V circuit, program accurate MMSI and vessel data, and test AIS reception, AIS transmission, VHF performance, and wireless connectivity after installation. Secure Wi-Fi access to prevent unauthorized network use.

Before Ordering

Confirm Class B SOTDMA suitability, shared-antenna compatibility, VHF radio requirements, MMSI registration, GPS antenna needs, NMEA/USB/Wi-Fi/Bluetooth integration, 12V/24V power capacity, and protected mounting space before ordering.