What symbol is used for equipment that has gone overdue until the aircraft goes off alert status?

The correct answer is associated with a red dash, which indicates that the equipment has gone overdue. In the context of aircrew flight equipment and maintenance, specific symbols are used to communicate the status of items for operational readiness. A red dash serves as a clear and immediate visual warning that certain equipment is not current or up to date, typically indicating that it has not been inspected or serviced within the required timeframe.

This status is particularly important in a military or aviation setting where equipment reliability and readiness are vital for safe operations. Equipment that has gone overdue poses a liability, and thus, the red dash alerts personnel to address these issues promptly, especially before the aircraft goes off alert status. Such visual indicators help maintain a high standard of safety and operational readiness among aircrews.