How do you calculate Light Displacement Tonnage of Ships?

Light Displacement Tonnage (LDT) of a ship is calculated by measuring the weight of the vessel when it is not carrying any cargo, fuel, or provisions. This includes the weight of the ship's structure, equipment, and all onboard systems. To find the LDT, subtract the weight of all consumables (like fuel, water, and cargo) from the ship's total displacement when fully loaded. The resulting figure represents the LDT, typically expressed in metric tons.