When is DME provided by the ILS?

The correct answer emphasizes that DME (Distance Measuring Equipment) is provided by the ILS (Instrument Landing System) based on specific procedural documentation, which is outlined in the approach plates. Depending on the airport and the specific approach in use, the availability of DME can vary.

In many cases, DME is included as a component of the ILS, especially if there is a need to provide precise distance information for final approach guidance. However, this is not universally applicable to all ILS approaches, which is why reliance on the approach plates is crucial. Each approach plate will specify whether DME is provided and whether it is part of the ILS service. Therefore, referencing the approach plate is essential for determining the use of DME in conjunction with the ILS for a given airport or procedure.