Here's a patch from the U.S.C.G. Loran Station. It seems unfitted, and likely 80's era.
I don’t know much about the design for the station, but I like that the roadrunner has his little headset on.
LORAN is short for 'Long Range Navigation' and was developed during WWII as a hyperbolic radio navigation system for ships.
The Coast Gaurd (U.S.C.G.) took over the running of this system in 1958 and positioned a radio station on Sand Island, Johnston Atoll. Being a radio station, transmissions were recorded using QSL cards and you can see some of the USCG LORAN cards via the tags.