Final answer:
The Engineering Department is responsible for supplying power and water on a ship, managing systems like the nuclear-powered turbine propeller system, and ensuring regulatory compliance.
Step-by-step explanation:
The department responsible for supplying power and water throughout a ship is typically referred to as the Engineering Department or the Marine Engineering division. On vessels, particularly those powered by nuclear power, the turbine linked to a propeller system plays a crucial role in the propulsion of the ship. The rotating turbine shaft turns the propeller, enabling the ship to move through the water. Regarding water supply, the Engineering Department also manages the ship's freshwater generators, pumps, and distribution systems. Additionally, the Engineering Department is accountable for the upkeep of various shipboard systems and ensuring compliance with regulations such as the ones from the US Coast Guard (USCG) and the Environmental Protection Agency (EPA) concerning ballast water management to prevent biological invasions.