What is the marker beacon sensitivity that provides higher accuracy?

The level of marker beacon sensitivity that provides higher accuracy is referred to as "high." Marker beacons are used in conjunction with instrument approaches to provide precise location information to pilots navigating to an airport or runway. A higher sensitivity level enhances the pilot's ability to determine their position relative to the beacon, which is crucial for determining timely actions during the approach phase. When sensitivity is high, it allows the aircraft’s receivers to more accurately detect the signal, thus improving situational awareness and overall approach accuracy.

The concept of marker beacons relies on specific criteria for accuracy and reliability; therefore, medium or low sensitivity does not provide the same degree of precision needed for critical phases of flight. A very high sensitivity might sound appealing, but operationally, it might lead to issues such as false or erratic indications under certain conditions, thus reinforcing the importance of a balanced approach to sensitivity levels in instrument navigation aids.