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There is ONLY one legal Plimsoll Line, the International load line, which is a marking on a ship's side showing the limit of legal submersion when loaded with cargo under various sea conditions.
However, depending on the temperature and salinity of the water on which the ship is floating the position of this line (which represents the weight of water displaced by the hull) will vary. So the line is graduated into:-
The American Bureau of Shipping (AB) Line/ Summer Load line (S)
The Tropical Freshwater (TF) line
The freshwater Load line (F)
The tropical Zones load line (T)
The Winter Load Line (W)
Winter North Atlantic Load Line (WNA)
Thus if a ship were loaded to the TF line in tropical Freshwater then moved to the North Atlantic in winter with the same cargo loaded, it should float at the correct line in both conditions.
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Thee plimsoll line in fresh water and in salt water?
The plimsoll line is lower in salt water than in fresh
What are plimsoll lines used for today?
the plimsoll lines are what is on the side on a boat. when you fill a boat with heavy goods, the water can be no higher than the line otherwise the boat sinks.
Warm and cold water What should the people think as they load the ship with cargo?
It is not so much the water temperature that matters, but whether the ship is to sail on fresh or salt water. The salty oceans are denser than freshwater. Therefore, the ship can carry more cargo on the sea. This fact is noted on the bow of a ship by the Plimsoll line markings painted there.
How does a plimsoll line relate to water?
A load line is a line that limits the maximum mean draft, so that there will be sufficient freeboard and reserve buoyancy to insure the safety of the vessel. Plimsoll marks consist of a disk with a horizontal line through its center, indicating the summer load line, and a series of other horizontal lines indicating the load lines for various water and seasons. F or FW---Freshwater. IS---Indian Ocean in summer. WNA--North Atlantic in winter. S---Summer in waters other than Indian Ocean. W---Winter in Waters other than North Atlantic. T---Tropical waters. TF---Tropical Fresh water.
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false
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