Who may authorize Circle Zebra closures and fittings to facilitate the crew for operational requirements?

• A. The Commanding Officer
• B. The Executive Officer
• C. The Chief Engineer
• D. The Navigator

Answer: (A)

Authority and responsibility for modifications that affect crew operations rests with the Commanding Officer. The CO bears final responsibility for ship readiness, safety, and mission success, so authorizing closures and fittings like Circle Zebra to facilitate the crew falls under that top-level authority. The Executive Officer can coordinate and implement such changes under the CO’s direction, but the ultimate decision rests with the CO. The Chief Engineer focuses on the engineering plant and systems safety, not general crew-area modifications, while the Navigator handles navigation-related equipment and procedures. This delineation keeps decisions about crew workflow aligned with overall command priorities and safety.