Final answer:
Marker beacon lights indicate an aircraft's position relative to navigation beacons during approach and are typically found at the top of the PFD on an MFD. These lights are color-coded and will illuminate when passing over the corresponding beacons.
Step-by-step explanation:
The student is asking about where to locate the marker beacon lights indicators within the Primary Flight Display (PFD) on a Multi-Function Display (MFD) in an aircraft cockpit. The marker beacon lights on a PFD/MFD are part of an aircraft's navigational aids, which help pilots determine their position relative to a particular navigation beacon during an approach to an airport.
The marker beacons consist of three types of beacons: outer, middle, and inner, each represented by different colored lights – blue for the outer marker, amber for the middle marker, and white for the inner (or slash for category II or III approaches) marker. Pilots can find these markers typically at the top of the PFD portion of the MFD, but the exact location may vary slightly depending on the aircraft and avionics manufacturer.
The display will illuminate the respective lights when the aircraft passes over these beacons during an approach, providing the pilot with visual and often audible signals. For example, the outer marker is generally located about 4 to 7 miles from the runway threshold, marking the start of an instrument approach. It's essential to refer to the aircraft's operating manual or have a training session specific to the aircraft model to ensure correct interpretation and location of the marker beacon lights on the PFD/MFD.