hulls
21Ironclad warship — An ironclad was a steam propelled warship of the later 19th century, protected by iron or steel armor plates. [Hill, Richard. War at Sea in the Ironclad Age ISBN 0 304 35273 X; p.17] The ironclad was developed as a result of the vulnerability of… …
22Submarines of the People's Liberation Army Navy — Submarines have long been one of the three focuses of the People s Liberation Army Navy (the other two are aircraft and attack boats), and when the decision was made in the late 2006 to concentrate on building other principal surface combatants… …
23Submarine — For other uses, see Submarine (disambiguation). A Japan Maritime Self Defense Force Oyashio class submarine in 2006 A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which… …
24Proa — A proa or prau is a type of multihull sailing vessel. While the word proa just means boat in its native language, the term proa in Western languages has come to describe a vessel consisting of two (usually) unequal length parallel hulls, sailed… …
25Catamaran — A catamaran (From Tamil kattumaram ) [cite web |url=http://www.etymonline.com/index.php?term=catamaran|title=catamaran |accessdate=2008 09 04 |format= |work=Online Etymology Dictionary ] is a type of multihulled boat or ship consisting of two… …
26Submarine hull — U 995, Type VIIC/41 U Boat of WWII, showing the typical combination of ship like non watertight outer hull with bulky strong hull below The term light hull (casing in British usage) is used to describe the outer hull of a submarine, which houses… …
27Hysucat — The Hysucat (HYdrofoil SUpported CATamaran) is the registered trademark for a foil assisted multihulled vessel, coined by the concept s inventor, South African naval architect Professor Karl Günter Hoppe (FASTcc), Unistel Technologies and… …
28Convex set — A convex set …
29Injective module — In mathematics, especially in the area of abstract algebra known as module theory, an injective module is a module Q that shares certain desirable properties with the Z module Q of all rational numbers. Specifically, if Q is a submodule of some… …
30Minkowski addition — The red figure is the Minkowski sum of blue and green figures. In geometry, the Minkowski sum (also known as dilation) of two sets A and B in Euclidean space is the result of adding every element of …
