What does a VORTAC provide at a single site?

A VORTAC is a composite navigation facility that provides multiple types of navigational guidance from a single location. Specifically, it combines the functionality of a VOR (VHF Omnidirectional Radio Range) and a TACAN (Tactical Air Navigation) system.

At a VORTAC site, pilots receive the VOR azimuth signal, which helps in determining their aircraft's bearing relative to the VOR station. In addition, it provides the TACAN azimuth, essential for military operations and compatible with civil aircraft equipped with TACAN receivers. Furthermore, VORTACs offer Distance Measuring Equipment (DME) capabilities associated with the TACAN system, allowing pilots to determine their distance from the station precisely. Together, these signals enable comprehensive navigation support for both civilian and military aviation operations.

This comprehensive functionality at a single site makes the VORTAC a vital asset in air traffic management and navigation. Other options reflect different systems (such as ILS and localizer signals) that do not pertain to a VORTAC's capabilities, and hence, do not apply in this context.