Which statement correctly describes the relationship between IDARS and its data acquisition role?

• A. IDARS is independent from FDR
• B. The FDR is the central unit of IDARS
• C. HUD is part of IDARS
• D. The DTM replaces IDARS

Answer: (B)

The key idea is that data acquisition in this system revolves around a central unit that handles recording and storage. The Flight Data Recorder serves as that hub for IDARS, acting as the focal point that collects data from sensors, time-stamps it, and stores it for retrieval. IDARS provides the means to capture and route data so it ends up in the FDR, rather than operating independently from it. The HUD is primarily a display interface, not the main data hub, and the DTM handles data transfer rather than replacing the entire data acquisition system. So, recognizing the FDR as the central unit correctly reflects how IDARS fits into the data acquisition setup.