Final answer:
Marker Beacons are radio beacons that provide distance information and assist pilots in aligning the aircraft with the runway during instrument landings.
Step-by-step explanation:
The Instrument Landing System (ILS) is a navigational aid used by pilots to land an aircraft safely.
It consists of several components, including Marker Beacons. Marker Beacons are radio beacons located along the approach path to the runway. They provide pilots with distance information and help them align the aircraft with the runway.
There are three types of Marker Beacons: Outer, Middle, and Inner Marker. The Outer Marker is typically located 4-7 nautical miles from the runway. When the aircraft passes over the Outer Marker, the pilot can hear a specific Morse code signal, indicating that they are on the correct approach path. The Middle Marker is located approximately one mile from the runway, and its Morse code signal indicates that the aircraft is at the proper altitude for landing. Lastly, the Inner Marker is located close to the runway threshold and provides pilots with confirmation that they are near the touchdown zone.
Marker Beacons play a crucial role in ensuring the safety and accuracy of instrument landings. They help pilots navigate through poor visibility conditions and guide them to the runway with precision. By listening to the Morse code signals emitted by the Marker Beacons, pilots can determine their position and altitude, making the landing process smoother and safer.