Which deck is referred to as the uppermost deck on ships other than an aircraft carrier?

The uppermost deck on ships, other than aircraft carriers, is referred to as the Main Deck. This deck serves as the primary working and living space for the crew, providing access to various parts of the ship and supporting essential operations.

The term "Main Deck" encompasses the area where the ship's main structures and systems are present, making it a crucial part of a ship's design and functionality. This deck is typically the highest continuous deck and often serves as the primary point of navigation and operational activities for the ship.

In contrast, the Weather Deck refers to the exterior deck that is exposed to the elements but is not necessarily the uppermost deck on multi-deck vessels. The Flight Deck is specific to aircraft carriers and is where aircraft operations take place, and the Quarterdeck is usually designated as a ceremonial area for arrivals and departures, as well as a place for watch officers. Each of these has its specific function and location on a ship that differentiates them from the Main Deck.