What are load lines commonly referred to as?

Load lines are commonly referred to as Plimsoll Marks. These marks are integral to maritime safety, indicating the maximum permissible draft of a vessel under different conditions, ensuring that the ship is not overloaded. This helps maintain the ship's stability and buoyancy, which are crucial for safe navigation. The Plimsoll line specifically helps to prevent overloading by indicating various loading limits depending on the water density and the type of sea conditions a vessel may encounter.

The Plimsoll mark is named after Samuel Plimsoll, a British politician and social reformer who advocated for safer shipping practices in the late 19th century. The proper understanding and application of load lines are essential for compliance with international maritime regulations, which are designed to protect both the vessel and its crew, as well as the marine environment.