Definition
A Plimsoll line (or load line) is a marking on a ship's hull indicating the maximum depth to which the ship can be safely loaded. It's a symbol of maritime safety ⚓. The marking consists of horizontal lines and letters that correspond to different water densities and temperatures. Exceeding the Plimsoll line is dangerous because it reduces the ship’s stability and buoyancy. It prevents ships from being overloaded and potentially sinking. The Plimsoll line is critical for safety.