i noticed a used Airmar ultrasonic weatherstation with a Combiner at a used marine store today so i bought it.
i am having a little problem getting data off of it. it has a usb output and openplotter sees it. the docs say to use 57600 with the combiner when i run cat /dev/the device i see gibberish and the light on the device is blinking like it should. so i am assuming data is coming from the device..
my question is their a linux command i can use to see the nmea stream so i can tell if it is actual working?

signalK is not getting any data