I'm apparently not understanding callout devices well enough.

I would like to observe the NMEA sentence traffic generated by a USB
GPS device.  When attached to a 4.0_RC1 system, I see the following
messages on the console:

uhidev0: DeLorme Publishing DeLorme USB Earthmate, rev 1.00/0.01, addr
4, icleass 3/0
uhid0 at uhidev0: input=32, feature=5

In looking at the manpage for uhid(4), I'm not seeing information on
what is the corresponding device name which can be used with cu(1).
Any clarification anyone can provide would be greatly appreciated.

Thanks.

Jim