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In naval architecture, an afterdeck or after deck, or sometimes the aftdeck, aft deck or a-deck is the open deck area toward the stern or aft back part of a ship or boat. The afterdeck can be used for a number of different purposes, yet not all ships have an afterdeck.
The currach has traditionally been both a sea boat and a vessel for inland waters. The River currach was especially well known for its shallow draft and manoeuvrability. Its framework was constructed of hazel rods and sally twigs, covered by a single ox-hide, which not only insulated the currach, but also helped dictate its shape.
The superstructure of this cargo ship is in the back and includes a lifeboat. The cruiseferry Mega Smeralda. The blue and white part of the ship is the superstructure and the yellow part of the ship is the hull. A superstructure is an upward extension of an existing structure above a baseline.
A hull is the watertight body of a ship, boat, submarine, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast.
The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite the bow, the foremost part of a ship. Originally, the term only referred to the aft port section of the ship, but eventually came to refer to the ...
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The block type is the simplest type. The leading end is usually rounded or pointed for reduced drag. "Its main function is to provide additional lift on the back of the hull, mostly during acceleration. It can also help provide better side-to-side stability at speed and reduce porpoising by providing a bit more hull surface at the rear of the ...