Question

Explain why plimsoll lines are marked on ships

Answer 1

A commercial ship is properly loaded when the ship's waterline equals the ship's Plimsoll line.
The Plimsoll lineis a reference mark located on a ship's hull that indicates the maximum depth
To which the vessel may be safely immersed when loaded with cargo.

Answer 2

plimsoll lines are marked on ships to indicate the maximum depth , the ship should sink while being loaded with cargo , the height of these lines depends on the dimensions of the ship. If the ship sinks above this line then the possibility of a shipwreck are very high.