Which of the following information is missing in Unpaired Limited Data Blocks?

In the context of Unpaired Limited Data Blocks, the absence of the aircraft call sign is significant. Unpaired Limited Data Blocks are often utilized in situations where radar data from an aircraft is presented without full identification details. This is particularly common when dealing with non-equipped aircraft or when the radar system is unable to receive complete data inputs due to various limitations.

The aircraft call sign is a crucial piece of information as it provides instant identification of the aircraft to controllers and allows for effective communication and coordination. Without it, controllers can struggle to manage traffic effectively, potentially leading to confusion or mistakes.

While altitude data, flight plan details, and destination airport information can often be available through other means or systems, the exclusion of the aircraft call sign in Unpaired Limited Data Blocks is a unique limitation that impacts operational capabilities directly. Understanding this gap helps personnel prepare for situations where quick recognition of aircraft is hindered, thereby emphasizing the importance of having complete data for safe and efficient air traffic management.