How do I get AIS data into OpenCPN. I do have the Plugin for AIS installed. I have an EM-Track B100 AIS class B transcicer installed. The B100 has a USB connection for data to get to the PC. I have inserted the USB cable to a 7 port USB-hub. If I try to open a connection under the connection menu in OpenCPN I can see /dev/ttySO and /dev/ttyS1. But I cannot see any AIS signals in OpenCPN