What is the authority that governs the establishment of operational guidelines for Navy boats?

The correct answer pertains to the Chief of Naval Operations (CNO), who provides the overarching authority for developing, implementing, and maintaining operational guidelines across the Navy. This role is crucial as the CNO is responsible for the readiness and operational capabilities of naval forces. Under their leadership, the CNO defines policies and procedures that are essential for the effective operation of vessels and guidelines affecting boatswain's mates.

Other entities like OPNAVINST, which refers to directives issued by the Office of the Chief of Naval Operations, and NAVSEA, which is involved in the design and maintenance of naval ships and systems, also play significant roles but are focused on specific aspects of naval operations rather than the overall authority. SECNAV, as the Secretary of the Navy, has a broader administrative role that encompasses the entire Navy and Marine Corps but does not directly establish operational guidelines for boats.