What is one of the required items to be displayed in the Flight Data Block (FDB)?

The correct response is centered on the requirement for displaying essential information within the Flight Data Block (FDB). The Aircraft ID is a crucial identifier for any aircraft in flight operations. It allows air traffic controllers and other aviation personnel to readily distinguish between different aircraft, ensuring appropriate communication and instructions are conveyed.

The Aircraft ID serves several important purposes: it aids in tracking the aircraft, helps in the identification during communication, and contributes to maintaining safety by enhancing situational awareness for controllers. This accuracy is paramount, especially in busy airspace, where multiple aircraft may be operating simultaneously.

Regarding the other options, while they may provide valuable information in various contexts, they do not fulfill the specific requirement for the FDB. The Flight Path indicates the trajectory of the aircraft but is not an essential item in the FDB. Weather Conditions may be pertinent for overall situational awareness, yet it is not a primary data point within the FDB. Flight Time, while useful for operations management, does not constitute a mandatory display item in the FDB. Thus, the Aircraft ID stands out as the required and vital element for effective flight management and communication in air traffic control operations.