What is indicated by the term "topside" on a ship?

The term "topside" refers to the areas of a ship that are above the main deck. This terminology is widely used in naval contexts to describe the upper portions or levels of a vessel. These areas can include the weather decks and any structures above the main deck, such as the bridge or masts. By referring to "topside," one is generally indicating the spaces located higher than the deck level, which aligns with the notion of being 'upstairs' relative to other compartments or areas below the main deck. Understanding this term is crucial for proper communication and navigation on a ship, as it helps distinguish between the various levels and functionalities of the vessel.