What is the only positive method of identifying a VOR?

The only positive method of identifying a VOR (VHF Omnidirectional Range) is by its Morse code identifier. VORs transmit a continuously repeating Morse code signal that acts as a unique identifying feature. When pilots tune into a VOR frequency, they can listen for this distinctive Morse code, which aids in confirming that they are aligned with the correct station. This method is universally accepted in aviation for positively identifying navigation aids, as the Morse code identifier is specific to each VOR and allows pilots to verify their navigation source accurately.

The other methods, while useful, do not provide the same level of certainty. For example, radar location may indicate the presence of a VOR but does not confirm its identity. GPS coordinates can help locate a VOR, but they do not provide a definitive identification. Distance measurement may indicate proximity to a VOR but also lacks confirmation of which VOR is being accessed. Thus, reliance on the Morse code identifier is critical for ensuring accurate and safe navigation using VORs.