What is the waterline? The types of waterlines

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2018-03-22 22:32:08

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The article describes about what is the waterline, for what it is and when it was first introduced the compulsory use of one of its species.

Ships

A Very long time, the only relatively quick method of travel remained ships. Of course, their use entailed a number of limitations, but more convenient and safe alternatives simply did not exist.

Eventually, when it was invented more or less reliable navigational instruments, people are able to travel between continents, which was a real breakthrough. Gradually, when shipbuilders were able to improve the design of ships, they have become mandatory to show a mark the waterline. But what is the waterline and why is it necessary? In this we will deal in this article.

Definition

what is the waterline

The Word comes from Dutch, which is quite logical. After all, the Kingdom was one of the first that distinguished the high quality of its fleet.

The Waterline – is the line at which the contact of the still water surface with the hull of a ship or other floating vessel. If we consider the term from the point of view of the design of the ships, the waterline – is a cross section of the housing the horizontal plane in the drawing. So now we know what the waterline.

Types of lines

The Line is of the following types:

  • A Constructive line, which is the basis for building a theoretical drawing. Based on preliminary calculations, it shows the different types of tonnage of the ship.
  • The load line created to determine the maximum allowable drawdown of the vessel due to its workload. Typically, this type of waterline of the vessel coincides with the constructive.
  • Shows the Estimated sediment, which defines the theoretical characteristics of the vessel.
  • The Current is not applied to the hull, this concept, which determines the current drawdown level of the ship, depending on its workload or type of water.

below the waterline

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If we talk about the current waterline, it depends on many factors, for example, the shape of the hull, the density of the material of which it is built, weight, water wave and others.

The Area of the waterline can be used to calculate the completeness of the body. However, depending on load, weather, water density and other factors, the area of the waterline can vary greatly, and with it the roll and the stability of the ship. If we talk about its length, it serves as a linear dimension in determining the Froude number for ships with a displacement of, and hence their speed in theory. Now we know what the waterline.

But in more detail let us consider such a species as the Plimsoll line.

Commercial grade

In 1890, this stamp became mandatory on all cargo ships. Unlike other species the waterline, its purpose is more practical role.

The fact that prior to the introduction of such a waterline merchant ships sank because of overloading, the difference of density of water, depending on the region, time of year, its salinity and other things. Then was introduced the load line. The person responsible for the load, calculates the maximum permissible load for the ship, checking with the route, weather conditions, water type and other parameters. An example of such a timestamp, you can see in the photo below.

waterline ship

Simply put, the Plimsoll line was introduced in order to monitor the workload of the vessel, and if the water is below the waterline, it's all right. But as already mentioned, it depends on the type of water, seasons and other parameters. In 1890 in Britain, a law was passed for mandatory use of truck brand.


Article in other languages:

AR: https://www.tostpost.com/ar/education/11234-what-is-the-waterline-the-types-of-waterlines.html

BE: https://www.tostpost.com/be/adukacyya/20127-shto-takoe-vaterl-n-v-dy-vaterliniy.html

DE: https://www.tostpost.com/de/bildung/20139-was-ist-wasserlinie-arten-vaterliniy.html

ES: https://www.tostpost.com/es/la-educaci-n/20157-qu-es-la-l-nea-de-flotaci-n-tipos-de-l-neas-de-agua.html

HI: https://www.tostpost.com/hi/education/11243-waterline-waterlines.html

JA: https://www.tostpost.com/ja/education/11243-waterlines.html

KK: https://www.tostpost.com/kk/b-l-m/20124-b-l-vaterliniya-t-rler-vatersyzy-yny.html

PL: https://www.tostpost.com/pl/edukacja/20095-co-to-jest-vaterliniya-rodzaje-vaterliniy.html

PT: https://www.tostpost.com/pt/educa-o/20097-o-que-a-linha-de-flutua-o-tipos-de-linhas-de-gua.html

TR: https://www.tostpost.com/tr/e-itim/20128-nedir-vaterliniya-t-rl-vaterliniy.html

UK: https://www.tostpost.com/uk/osv-ta/20116-scho-take-vaterl-n-ya-vidi-vaterl-n.html

ZH: https://www.tostpost.com/zh/education/12008-what-is-the-waterline-the-types-of-waterlines.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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