Class B 5 W SOTDMA AIS transceiver with an integrated VHF antenna splitter for sharing the existing antenna with the radio.
The EM-TRAK B953 transmits the vessel identity, position, course and speed and receives nearby AIS targets. GPS and its antenna are integrated; navigation equipment can be connected through NMEA 2000, NMEA 0183 or USB. This version does not include Wi-Fi or Bluetooth.
Key benefits
- Integrated VHF splitter: shares a suitable VHF antenna between AIS and radio through the two SO-239 connectors.
- Navigation integration: NMEA 2000 Micro-C, NMEA 0183 and Micro-USB for a chartplotter, PC or other compatible equipment.
- Protected installation: FLEXI-FIT bracket, integrated GPS and IPX6/IPX7 protection.
Compatibility and installation
Connect to a chartplotter or display that accepts AIS data through NMEA 2000 or NMEA 0183, or to a computer through USB. Splitter installation requires a VHF antenna suitable for 156 and 162 MHz, cable terminated with PL-259 and a VHF radio with a coaxial connection. Check the onboard network, available cabling and the distance to the antenna and radio before ordering.
Technical specifications
| Model / SKU | B953 / 430-0013 |
|---|---|
| Class and transmit power | 5 W Sotdma |
| Antenna splitter | Integrated VHF |
| Wireless connectivity | No |
| Interfaces | NMEA 2000, NMEA 0183 and Micro-USB |
| Supply | 12–24 V DC; 9.6–31.2 V maximum range |
| Average draw at 12 V | 245 mA / 2.95 W |
| Peak current | 2.5 A |
| Dimensions | 149 × 118 × 47 mm |
| Weight | 345 g |
| VHF antenna | SO-239; SO-239 radio connector |
| External GPS antenna | TNC; optional |
| Protection | IPX6 and IPX7 |
| Operating temperature | −25 to 55 °C |
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