The upper deck of a ship refers to the topmost structure or the “roof” of the hull, often exposed to the elements (including saltwater, sun, and weather). The upper deck typically includes spaces like cargo holds, equipment storage areas, and various systems that are critical to the ship’s operations.

Given its exposure to harsh maritime conditions, the upper deck may require ongoing maintenance and repair works, such as steel plate renewal, piping replacement, and valve repair/replacement. These activities are crucial to ensure the ship’s structural integrity, operational safety, and compliance with maritime standards.