The waterline is the line where the hull of a ship meets the surface of the water.
Waterline of a ship. The mark above the waterline indicates the Plimsoll line
The load line, also known as Plimsoll line, indicates the legal limit to which a ship may be loaded for specific water types and temperatures in order to safely maintain buoyancy, particularly with re
Waterline
…in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines plans. The load line (also known as Plimsoll line) is the waterline which indicates the legal limit to which a ship may be loaded for specific water types and temperatures…
Load line mark and additional load lines on the hull of a ship
Load line markings on a cereal carrier, certified by Bureau Veritas.
Lloyd's Register ("LR") load line mark and lines for commercial sailing vessels
Lloyd's Register ("LR") load line mark and lines and timber load line mark and lines for power-driven merchant vessels