Final answer:
The VORTAC symbol is used to indicate a VORTAC location at an airport.
Step-by-step explanation:
In airports, a symbol used to indicate a VORTAC location is the VORTAC symbol itself. VORTAC stands for VHF Omni-directional Range and Tactical Air Navigation. It is a type of navigation aid that combines a VOR (VHF Omni-directional Range) station and a TACAN (Tactical Air Navigation) station. The symbol usually consists of a small circle with two arrows pointing out in opposite directions.