The SI-TEX MDA-5H is a fully certified 5-Watt SOTDMA Class B AIS transceiver built for vessels that need reliable visibility in congested commercial harbors and busy coastal waters. Unlike standard Class B units, its SOTDMA technology follows Class A transmission priorities, ensuring your vessel broadcasts even in high-traffic port environments. The integrated zero-loss VHF antenna splitter eliminates the need for a dedicated second antenna, and dual receivers decode all DSC and AIS messages including MOB and SART signals. This model does not include Wi-Fi.

FCC Programming Requirement: All units sold in the US must be programmed by a qualified technician. A copy of your MMSI registration or FCC Ship Station License and the vessel master or owner's signature on the completed programming form are required at the time of purchase. Download the programming form here.

Key Features:

• 5-Watt SOTDMA Class B transmitter -- extends detection range for other vessels and AIS tracking websites
• SOTDMA Class A transmission priorities maintain broadcast capability in congested commercial harbors and ports
• Integrated zero-loss VHF antenna splitter -- no second VHF antenna required
• Built-in GPS and GLONASS satellite navigation receiver
• Dual receivers decode all DSC and AIS messages, including MOB and SART
• NMEA-0183 data port, NMEA-2000, and USB connectivity for full bridge system integration
• Waterproof to IPX7
• Ultra-low power consumption
• Certified to IEC-62287-2, FCC, and USCG standards
• 2-year warranty

In the Box:

• Commercial-grade external GPS antenna with coax cable
• Mounting hardware
• Power and data interface cable
• VHF radio connection cable
• Product information DVD with ProAis2 software for programming and troubleshooting
• User manual and quick start guide

Specifications:

• Transmitter Output Power: 5 Watts
• VHF Antenna Connector: SO-239 UHF
• GPS Antenna Connector: TNC
• Frequency Range: 156.025–162.025 MHz
• Input Voltage: 9.6–31.2 VDC
• Current Draw: 220 mA average power consumption
• Operating Temperature Range: -25°C to +55°C
• Ingress Protection: IP67
• Dimensions (transceiver): 6.8" W x 5.0" H x 2.0" D
• Weight: 0.8 lbs.