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em-trak Product Support
B400 Class B (SO) AIS Transceiver
Troubleshooting
Troubleshooting
Why isn't my chartplotter displaying AIS data?
How can I tell if my B400 is transmitting?
Why can't I get a GPS fix?
Why am I getting a ‘VSWR’ alarm'?
Why can't I see my B400 on AIS websites?
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