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Single hull, Double bottom, and Double hull ship cross sections. Green lines are watertight; black structure is not watertight. A double hull is a ship hull design and construction method where the bottom and sides of the ship have two complete layers of watertight hull surface: one outer layer forming the normal hull of the ship, and a second inner hull which is some distance inboard ...
A small waterplane area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea , where wave energy is located, minimizes a vessel's response to sea state, even in high seas and at high speeds.
Boat building is the design and construction of boats (instead of the larger ships) — and their on-board systems. This includes at minimum the construction of a hull , with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.
The Nydam boat, an early example of clinker construction. The earliest example of ship and boat building using overlapped planking joined with metal fastenings is in an extended logboat from Björke in Sweden. This dates to c. 310 AD. The Nydam boat is an almost complete example of a boat built with clinker construction. It has overlapping ...
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 .
A padded V-hull is a hull shape found on both pure race boats and standard recreational craft. A variation of the more common V-hull , which has a V-section throughout the length of the vessel, a padded V-hull has a V-section at the bows and the forward part of the keel which then segues into a flat area typically 0.15 metres (5.9 in) to 0.25 ...
[22] [23] In modern terminology, especially in leisure or sport boating, double-outrigger ships are usually termed trimaran or triple-hull ships. An unusual type of double-outrigger boat design, preserved in scale models in the Pitt Rivers Museum, forms a triangle shape. The front ends of the outriggers are attached directly to the hull, while ...
In that period, sail plans might start from smallest to largest boat or ship in a hierarchy of sailing rigs: [10] [2] Yachts. Catboat with a single sail; Sloop with mainsail and jib; Yawl with a small mast behind the steering post; Ketch with a mizzenmast ahead of the steering post; Working boats and coastal freighters. Cutter with a single ...