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See topic Facility coverage.
Navaid Collocation
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A VOR instance may be collocated with a DME.
A VOR (and DME) may only maintain a single collocation relationship at a time, which means that it is not possible to collocate a VOR with two different DMEs. In the AIP collocated VOR and DME Navaids are usually referred to as VOR/DME or DVOR/DME respectively.
A VOR instance may also be collocated with a TACAN.
A VOR (and TACAN) may only maintain a single collocation relationship at a time. In the AIP collocated VOR and TACAN Navaids are usually referred to as VORTAC or DVORTAC, respectively.
For more details see topic Landing Systems & Navaid Collocation.
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