Which part of the DOI Departmental Manuals outlines aircraft management responsibilities?

The correct choice relates to Part 350 of the DOI Departmental Manuals, which specifically addresses aircraft management responsibilities. This part provides the guidelines and frameworks necessary for the effective management and oversight of aircraft operations within the department. It encompasses policies concerning the maintenance, safety, and operational standards that are essential for managing aircraft effectively.

By detailing the responsibilities for maintaining compliance with federal aviation regulations and ensuring safe operations, Part 350 serves as a critical resource for personnel involved in aircraft management. Understanding this part is crucial for ensuring that all aircraft are operated safely and efficiently, which aligns with the broader goals of aviation safety practices.