What does the DME hold function allow a pilot to do?

The DME hold function is designed to enhance a pilot's navigation capabilities, allowing them to access Distance Measuring Equipment (DME) information from a different VHF station. When activated, the DME hold function enables the aircraft to maintain the distance reading from the selected DME station, even if the aircraft transitions to a different navigational frequency. This can be useful in various situations, including when the pilot wants to maintain situational awareness of their distance from a VHF station while still navigating to or from another point.

Understanding this function is important for pilots, as it helps them manage their navigation and situational awareness without needing to switch back and forth between different DME frequencies frequently. It provides a way to remain informed about the distance to a particular navigation aid even during changes in the navigation scenario. This capability is essential for effective flight management and can enhance operational safety.