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What is a water line on a ship?

Updated: 9/14/2023
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Q: What is a water line on a ship?
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What happens to the water level when the ship is loaded?

The ship becomes lower in the water. See the Plimsoll Line. ______________ The ship settles in the water at the point where the volume of the ship under the water i.e. the weight of the water it displaces is equal to the weight of the ship. ______________ I rather think I said that, though in fewer words; see the Plimsoll Line, probably the simplest invention in human history. Refer to the Merchant Shipping Act of 1875 (British Parliament).


What tells how much a ship can be loaded to be safe in different water conditions?

The Plimsoll line... it's a series of marks on the outer hull of a ship - that indicates how deep the vessel is sitting in the water.


How did the shipyard launch such a huge ship into the water?

Shipyard workers would line the slipway with grease and soap and slide the ship into the water. The launch of the Titanic took over 25 tons of grease and soap.


What is the formula to float a ship?

When the total weight of the ship is less than the weight of the volume of water (salt or fresh) that the ship displaces, it will float. You can make a ship out of steel or concrete, as long as it weighs less than the volume of water it displaces. How sea-worthy the ship is depends on what type of waves or what the possiblity is of the ship taking on water, unless the exterior is sealed. To calculate this, you will need the exterior dimensions of the hull and weight of the ship. I would use the metric system, because the units are easier to convert for this example. Kilograms (1000-grams) for weight and Liters (1000-cubic centimeters) for volumes. Using a volumetric formula (i.e. length x width x height) to obtain the volume you wish to be below the water line. Take the weight of the ship and divide it by the volume you obtained for the ship at or under the water-line. If this number is less than the specific-gravity of fresh water (lighter than salt water) it will float, provided the center of gravity is on the bottom of the ship. (otherwise it may turn up-side down). The specific gravity of water is ~1.0 kilogram per Liter. For example if the volume (LxWxH) displaced (below the water line) by the ship is 100 liters and the weight of the whole ship is 60 kilograms, 60/100 = 0.6 which is less than the water specific gravity 1.0, then it should float. Bear in mind that the ~70% of the weight of the ship should be below the water line or the ship will not have stability (it may turn over). This should also take into account added weight to the ship such as cargo or (God forbid) water.


How a ship keeps a float?

It basically wants to push (displace) water away from underneath it. Since the volume of water is always much larger than the actual ship, it will never be able to displace enough water to sink. That is - unless it's damaged below the water-line so water can flood in.

Related questions

What is the line called on the side of a ship?

The line at the lower part of the hull is the water line. Its location shows if a ship is riding high in the water or if it can't be seen then a ship is riding low in the water.


What is the line to where the surface water comes on the side of a ship?

water line


What is the line on the side of a ship called?

The waterline is an imaginary line witch a ship or boat floats. The warmer or colder the water the less or more it floats. WIKI --- Waterline


What happens if the plimsoll line is below the level of the water?

The plimsoll line is a reference mark painted on the bow of a ship. If the line is below the water level, the ship is overloaded. There are lines for when on fresh water and when on salt water.


What thewhite line is called on the side of a ship?

The lines drawn around the hull of a ship near the water-line is called a "Plimsoll line". This horizontal line is easily seen when the ship is empty and therefore riding higher out of the water. The more cargo loaded into ship the deeper it sinks into the water, and a ship can only be loaded with cargo etc down to this line and no furthur. Before its introduction there was no safe-loading-line on a vessel to prevent overloading by unscrupulous owners.


A ship standing in the docks extends 42 feet above the water line. the water rises in the docks at rato of 6 feet a minute after 3 minutes how far does the ship still extend above the water?

As the water rises, so does the ship, so, after 3 minutes the ship would extend 42 feet about the water line.


If an iceberg has 90 percent of its body below the water line then why doesn't a cuise ship with 90 percent of its body above the water line roll over?

because the ship is to heavy


What are other names used for waterline?

The Plimsoll Line, a possible name, is the line on a ship when the water level is at on the hull of the ship. It is more commonly known as the International Load Line.


How high was the ship Titanic?

The Titanic was 60' from the water line to the deck.


What happens to the water level when the ship is loaded?

The ship becomes lower in the water. See the Plimsoll Line. ______________ The ship settles in the water at the point where the volume of the ship under the water i.e. the weight of the water it displaces is equal to the weight of the ship. ______________ I rather think I said that, though in fewer words; see the Plimsoll Line, probably the simplest invention in human history. Refer to the Merchant Shipping Act of 1875 (British Parliament).


What will be the length of a ship's ladder be above the water line after the tide rises by 4 ft when normally it is 11 ft above the water line?

This is a trick question. As the tide rises, the ship rises with it (it is floating). The length of the ladder above the water line will still be 11 feet no matter how the tide changes. Only a change in the ship's weight would alter its position in the water.


Where would you find a plimsoil line?

Do you mean the plimsoll line then if so it's found on the outside of a ship to determine the water line.