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The keel is the bottom-most longitudinal structural element of a watercraft. On some sailboats, it may have a hydrodynamic and counterbalancing purpose as well. The laying of the keel is often the initial step in constructing a ship. In the British and American shipbuilding traditions, this event marks the beginning date of a ship's construction.
The event recognized as the keel laying is the first joining of modular components, or the lowering of the first module into place in the building dock. It is now often called "keel authentication" and is the ceremonial beginning of the ship's life, although some modules may have been started months before that stage of construction. [1] [2] [3]
Formerly made of rope, typically of braided stainless steel wire, occasionally solid metal rod. Stem: a continuation of the keel upwards at the bow where the two sides of the hull meet. Stern: the aftmost part of a boat, often ending in a transom. Stern sheets a flat area or deck, inboard of the transom in a small boat. It may contain hatches ...
Starting from the keel, these are the floor (which crosses the keel and joins the frame to the keel), the first futtock, the second futtock, the top timber, and the rail stanchion. [1] In steel shipbuilding, the entire frame can be formed in one piece by rivetting or welding sections; in this case the floor remains a separate piece, joining the ...
On larger modern vessels, the keel is made of or filled with a high density material, such as concrete, iron, or lead. By placing the weight as low as possible (often in a large bulb at the bottom of the keel) the maximum righting moment can be extracted from the given mass. Traditional forms of ballast carried inside the hull were stones or sand.
Carina (/ k ə ˈ r aɪ n ə, k ə ˈ r iː n ə / kə-RY-nə, - REE-) is a constellation in the southern sky.Its name is Latin for the keel of a ship, and it was the southern foundation of the larger constellation of Argo Navis (the ship Argo) until it was divided into three pieces, the other two being Puppis (the poop deck), and Vela (the sails of the ship).
When Nanchang was commissioned in 2020, it made the class a force to be reckoned with. Measuring 590 feet long and displacing 12,000-13,000 tons, it is the largest class of surface combatant China ...
[1] [2] The coins are not normally fixed in place and are often retrieved when the ship sails out of the dry-dock, [3] (although they are sometimes welded to the keel). [4] The mast stepping ceremony is a similar event which occurs towards the end of a ship's construction, and involves the placing of coins underneath the mast of a ship. In ...