What is this USB Device

Are there any part numbers, manufacturer names on it?

You need to chase the connection through to where it's connected to 'the kit'. Which bit of kit will help identify its purpose.
 
It is a multi serial to USB Adaptor. Can be used for talking to or listening to NMEA ports. If you have a laptop running suitable software then you can connect it to your nav system. There are unused Ports which can be used for all sorts .
 
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