How is a DME hold executed?

A DME (Distance Measuring Equipment) hold is executed primarily on the CDU (Control Display Unit) through the TUNE page or through other defined methods. This approach allows for precise input and management of the hold parameters necessary for navigation in aviation.

When a DME hold is initiated, the pilot utilizes the interface of the CDU, which provides a systematic way to enter and monitor the navigational data. This includes setting the specific DME station and defining the required holding pattern. By using the CDU, pilots can easily adjust the parameters and assess any changes in real-time.

Other methods specified for executing a DME hold may include using specific buttons or commands that are programmed into the aircraft's avionics system, but manual input via the CDU remains the standard and most efficient method. This option centers on precision and reliability, ensuring that pilots can effectively manage their navigation requirements during flight operations.

Other choices might suggest alternatives that are less direct or effective for executing the DME hold, given that voice commands or GPS navigation systems may not provide the detailed control and inputs necessary for implementing a hold as accurately as the CDU does.