Following the directions in https://wiki.mikrotik.com/wiki/Manual:System/GPS to enable a USB GPS system (Delorme Earthmate), I ran into a problem.

The USB port is not listed in /port print but I can see the device under Webfig->System->Resources->USB. Why? I've confirmed on a Linux system that the GPS and cable are functioning properly.

Hex POE running 6.45.1 with the GPS package installed.