To deactivate the AGN VOR for use in the Mission Computer Navigation solution, which line select key should be pressed?

To deactivate the AGN VOR for use in the Mission Computer Navigation solution, the appropriate line select key to press is the third one. This key is specifically designated for managing the navigation systems and functionalities within the Mission Computer, allowing pilots to control which navigational aids are active or inactive. Understanding the layout and functions of the Mission Computer keys is essential for efficiently managing navigation data in the C-17, as it directly impacts mission planning and execution.

Deactivating specific VORs ensures that the navigation solution remains streamlined and tailored to the mission requirements. The choice of the third key reflects its programmed association with toggling specific navigational inputs, making it crucial for pilots to be familiar with these controls for effective cockpit management.