Yes a VOR, most likely a VORTAC.
Before GPS, VORs where great, much easier to deal with than a NDB.
If you ignore the ident for now, a VOR has both FM and AM modulation. The first versions of VOR had a vertical 1/4 wave antenna inside a rotating metal cylinder. There was a slot in the cylinder. A bit of the antenna stuck out the top so you always got just a bit of the signal. What the rotation did was give the signal an AM modulation, and where the peak was depended on where you where in relation to the VOR. That alone doesn't help you much, so you have an FM modulation that is timed with it's peak to be when the slot is pointed to magnetic north.
Think of it in terms of lighthouse. You have a white light that spins and you see the flash. Now add a red omni directional light on top that flashes just as the rotating light points north. With the time difference between when you see the red flash and the white flash you know what "radial" you are on from the light house.
You now have two ways to tell exactly where you are, use two VORs and see where the radial cross. Or use DME and a VOR. Distance Measuring Equipment. DME is in the 900MHz and above range gets you within .1nm.
Having both at a site makes it a VOR-DME
VORs are VHF, the military needed something a bit more and also wanted UHF, so they have TACAN. TACAN also has DME by default. So a facility with all 3 is a VORTAC. This what most are, a VORTAC, a plain VOR or TACAN, or VOR-DME is rare. Even on a military base they put up VORTACs.
Newer VORs don't have an moving parts, they are a Doppler VOR like in this thread.
Wait, nothing moving..... Doppler......
Yea they electricaly move the signal around to the smaller antennas, you just think the transmitter is moving. The Doppler gives the FM modulation and the fixed part in the center gives the AM.