Aboard Ships and Large Boats
As stated above, superstructure consists of the parts of the ship or a boat, including sailboats, fishing boats, passenger ships, and submarines, that project above her main deck. This does not usually include its masts or any armament turrets. Note that in modern times, turrets do not always carry naval artillery, but they can also carry missile launchers and/or antisubmarine warfare weapons.
The size of a watercraft's superstructure can have many implications in the performance of ships and boats, since these structures can alter their structural rigidity, their displacements, or both. These can be detrimental to any vessel’s performance if they are taken into consideration incorrectly.
The height and the weight of superstructure on board a ship or a boat also affects the amount of freeboard that such a vessel requires along its sides, down to her waterline. In broad terms, the more and heavier superstructure that a ship possesses (as a fraction of her length), the less the freeboard that is needed.
Read more about this topic: Superstructure
Famous quotes containing the words aboard, ships, large and/or boats:
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—Mary Kay Blakely (20th century)
“A modern fleet of ships does not so much make use of the sea as exploit a highway.”
—Joseph Conrad (1857–1924)
“In most nineteenth-century cities, both large and small, more than 50 percent—and often up to 75 percent—of the residents in any given year were no longer there ten years later. People born in the twentieth century are much more likely to live near their birthplace than were people born in the nineteenth century.”
—Stephanie Coontz (20th century)
“Away down the river,
A hundred miles or more,
Other little children
Shall bring my boats ashore.”
—Robert Louis Stevenson (1850–1894)