Which specific tonnage measurement indicates the maximum weight of cargo, fuel, and stores a ship can carry?

The specific tonnage measurement that indicates the maximum weight of cargo, fuel, and stores a ship can carry is Deadweight Tonnage. Deadweight Tonnage, commonly abbreviated as DWT, represents the total carrying capacity of a ship for all variable loads when it is loaded to its deepest permissible draft, which is known as the summer load line. This maximum weight includes the actual cargo the ship is transporting, the fuel needed for its engines, fresh water for consumption, ballast water if it is carried for stability and not part of the ship's empty weight, provisions, the crew, and their personal effects. The summer load line is a specific mark on the ship's hull that indicates the maximum safe depth a ship can sit in the water under particular environmental conditions, as determined by international maritime regulations. To determine Deadweight Tonnage, one subtracts the Lightship Displacement from the Full Load Displacement. Full Load Displacement refers to the total weight of the ship and everything onboard when it is floating at its summer load line. Lightship Displacement, also known as Light Displacement, is the weight of the ship itself when it is completely empty, meaning it contains no cargo, fuel, water, provisions, crew, or any other variable items. It accounts solely for the ship's structure, machinery, and all permanently affixed equipment. Therefore, DWT precisely quantifies the total additional weight a ship can safely take on board beyond its own empty weight.