Thanks to those who responded. I finally have the laptop with the u-blox
card installed. It appears as:
umodem0 at uhub3 port 1 configuration 1 interface 0 "u-blox AG - www.u-blox.com
u-blox GNSS receiver" rev 1.10/4.05 addr 4
umodem0: data interface 1, has CM over data, has no break
umodem0: status change notification available
ucom0 at umodem0: usb1.5.00001.1
It looks me a little bit to figure out how to use ldattach(8) but
reading umodem(4), ucom(4), and then figuring out that ttyU0 and cuaU0
were the important interfaces was the key.
# ldattach -s 4800 nmea /dev/cuaU0
With that added, I have a sensor for ntpd.
$ ntpctl -s Sensors
sensor
wt gd st next poll offset correction
nmea0
1 1 0 6s 15s -45.090ms 0.000ms
Thanks for the pointers and feedback from everyone who responded.
Bryan
