Instrument Flight Rules (IFR) Practice Exam

The correct answer pertains to the concept that the middle compass locator is associated with an Instrument Landing System (ILS) and is identified by the last two letters of the localizer identification.

In an ILS setup, the localizer is a key component that provides lateral guidance to the pilot as they approach the runway. The localizer signal has a specific identifier, typically consisting of a three-letter code, which helps pilots identify the correct approach procedure. The last two letters of this identifier are used specifically to designate a compass locator that is intermediate between the outer marker and the approach end of the runway.

The middle compass locator serves to provide distance information to the pilot, complementing the visual cues received from the ILS's localizer and glide slope. Understanding this association is crucial for IFR operations, as it leads to more precise navigation during the approach phase of flight.

Each of the other options pertains to different components or facilities in the navigation system. The inner and outer markers are specific components of ILS and help in indicating the position of the aircraft during an approach, but they do not share the same identifier structure as the middle compass locator. The approach control facility is a service provided by air traffic control to manage and coordinate aircraft nearing an airport, rather than