Which of the following is NOT a hotel service provided by the ship?

Hotel services on a ship refer to the systems that provide comfort and essential services for the crew and passengers, similar to what is available in a hotel environment. This includes heating, hot water, and food preparation.

Heating steam is used for various purposes, including heating living spaces and maintaining sanitary facilities, making it a crucial hotel service. Hot water is essential for personal hygiene and cleaning, further reinforcing its role as a hotel service. Galley steam is also a hotel service as it is utilized in the preparation of food, ensuring that meals can be adequately cooked and served to crew members.

Ventilation, while absolutely necessary for maintaining air quality and temperature control on a ship, is typically classified under operational or environmental control systems rather than hotel services. Ventilation systems are more focused on the functional aspects of the ship's operations and safety rather than the comfort and habitable environment that hotel services provide. Thus, it stands out as the service that does not fit within the hotel services category.