Which range is associated with the frequency band of a Distance Measuring Equipment (DME)?

The correct range associated with the frequency band of Distance Measuring Equipment (DME) is 300 nautical miles. DME operates by transmitting a signal from the aircraft to ground-based equipment, which then replies, allowing the aircraft to determine its slant range distance from the DME station. The maximum usable range for DME is typically around 300 NM under standard operating conditions, making it a valuable tool for pilots in navigation.

This range is specified in various aviation regulations and guidelines, reflecting the limits of DME technology for accurate distance measurement in air traffic management and navigation. While other distances mentioned in the choices may appear plausible, they do not align with the established operational capabilities of DME systems, which is why 300 NM is recognized as the standard maximum effective range.