Which tools are the sector team's primary source of flight data?

• A. ACL and DL
• B. Voice logs
• C. Free text notes
• D. Radar data

Answer: (A)

The main idea is that the sector team needs a clear, official, and searchable record of what flight data actually exists for each aircraft. The tools that compile and store structured flight data from the source—such as filed flight plans, amendments, aircraft identity, routing, timing, and, when used, data-link communications—are designed specifically to capture this information in a consistent, time-stamped way. Because ACL and DL pull together these official records, they provide a complete and auditable picture of what was planned versus what transpired, which is essential for accurate situational awareness and post-event review.

Voice logs, while useful for capturing conversations, are unstructured and can be incomplete or ambiguous, making them harder to search or verify. Free text notes suffer from variability in wording and completeness, which reduces reliability. Radar data shows where the aircraft is at any moment, but it doesn’t inherently include the flight plan, amendments, or the full communications history, so it cannot fully stand in for the official flight data record. That combination of completeness, structure, and traceability is why ACL and DL are the best sources for the sector team’s flight data.