What term is used to describe the rooms on a ship?

The term "compartments" is used to describe the rooms on a ship because it specifically refers to the various enclosed spaces within a vessel that serve different purposes, such as sleeping quarters, storage areas, and operational spaces. Each compartment is typically designed to maximize the efficient use of space and ensure safety and organization aboard the ship.

While "cabins" might refer to sleeping quarters specifically, it does not encompass all types of rooms on a ship. "Ranks" generally pertain to levels of authority or status rather than physical spaces. The term "sections" could describe broader areas but does not accurately convey the structured and designated spaces that "compartments" implies. Thus, "compartments" is the most appropriate term to categorize the various rooms found on a ship.