Final answer:
The topside sentry is stationed whenever the ship is underway to maintain security and watch, identifying potential threats or safety concerns.
Step-by-step explanation:
The question addresses the duties of naval personnel, specifically the role of a topside sentry. The topside sentry is stationed whenever the ship is underway, not just during battle stations, at night, or only during peacetime. This role is crucial for maintaining security and keeping watch over the ship's surroundings, ensuring that any potential threats or safety concerns are identified and reported immediately. The topside sentry plays a vital role in the overall safety and effectiveness of the ship's operations.