Akademik

Plimsoll line
n. (also Plimsoll mark) a marking on a ship's side showing the limit of legal submersion under various conditions.
Etymology: S. Plimsoll, Engl. politician d. 1898, promoter of the Merchant Shipping Act of 1876

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ˈPlimsoll line 7 [Plimsoll line Plimsoll lines] (also ˈload line) noun
a line on the side of a ship showing the highest point that the water can safely reach when the ship is loaded
See also: ↑load line  
Word Origin:
named after Samuel Plimsoll (1824–98), the English politician whose agitation in the 1870s resulted in the Merchant Shipping Act of 1876, ending the practice of sending to sea overloaded and heavily insured old ships, from which the owners profited if they sank.

Useful english dictionary. 2012.