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Ship launching and naming : ウィキペディア英語版
Ceremonial ship launching

Ceremonial ship launching is the process of transferring a vessel to the water. It is a naval tradition in many cultures, dating back thousands of years. It has been observed as a public celebration and a solemn blessing.
In addition to the size and weight of the vessel, ship launching imposes stresses on the ship not met during normal operation, and represents a considerable engineering challenge, in addition to a public spectacle.
Ship launching involves many superstitions intended to invite good luck, such as christening by breaking a sacrificial bottle of champagne over the bow as the ship is named aloud and launched.〔(【引用サイトリンク】title=History of Ship Christenings With Champagne )
==Methods of launch==
There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching." The oldest, most familiar, and most widely used is the end-on launch, in which the vessel slides, usually stern first, down an inclined slipway. The side launch, whereby the ship enters the water broadside, came into 19th-century use on inland waters, rivers, and lakes, and was more widely adopted during World War II. The third method is float-out, used for ships that are built in basins or dry docks and then floated by admitting water into the dock.
In all cases heavy chains are attached to the ship and the drag effect is used to slow the vessel once afloat until tugboats can move the hull to a jetty for fitting out.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Ceremonial ship launching」の詳細全文を読む



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