What is the civilian term for "overhead" in Navy vernacular?

In Navy vernacular, the term "overhead" refers to the area above one's head when inside a ship or a naval facility. The corresponding civilian term for "overhead" is "ceiling." In civilian architecture and construction, the ceiling is the upper interior surface of a room, serving as a protective barrier above the living or working space.

Understanding this terminology is crucial for effective communication and safety awareness within naval environments. Sailors and naval personnel must accurately interpret these terms to avoid misunderstandings, especially in situations involving navigation, maintenance, and personnel movement. The other terms, such as "deck," "bulkhead," and "floor," refer to different structural components of a ship's interior and do not equate to the civilian use of "ceiling."