Who controls all IDARS functions in the T-6 aircraft?

In the T-6 aircraft, all functions of the Integrated Data and Recording System (IDARS) are controlled by an onboard computer. This system is designed to collect, process, and store data related to the aircraft's performance and operations, ensuring accurate monitoring and recording. The computer manages the various inputs from the aircraft's sensors and systems, allowing for real-time data analysis and reporting. This level of automation enhances safety and operational efficiency, as it reduces the workload for the pilot and co-pilot, allowing them to focus on flying the aircraft rather than managing data processing.

The other options do not have control over the IDARS functions in the same capacity. While ground control operators and maintenance crews may interact with or rely on the data provided by IDARS, they do not directly manage its functions. The pilot and co-pilot, while critical for flight operations, do not control the IDARS system itself; they utilize the information it provides. Therefore, the computer is the correct answer as it is the central component managing all IDARS capabilities.