What is the function of DOI Departmental Guides regarding aviation operations?

The function of DOI Departmental Guides in relation to aviation operations is to dictate non-mandatory preferred procedures that may be adopted. These guides serve as recommendations rather than strict regulations, allowing for flexibility in how aviation operations are conducted within the Department. This means that while the guides provide a framework and best practices to enhance safety and efficiency, they do not impose mandatory requirements that must be followed by all personnel. This approach recognizes the need for operational discretion and the varied contexts in which aviation operations may occur. By offering preferred procedures, the DOI encourages individuals and organizations to improve their operational standards while still allowing for customization and adaptation based on specific circumstances.