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en.wikipedia.org/wiki/Rudder

A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other conveyance that moves through a fluid medium ( generally air or water). ... More specifically, the steering gear of ancient vessels can be classified into side-rudders and stern-mounted rudders, depending on their location ...

rexwordpuzzle.blogspot.com/2009/07/thursday-jul-16-2009-container-for.html

Jul 16, 2009 ... Ships whose rudders don't touch water — THURSDAY, Jul. 16 2009— Destination of Saul / Container for folding scissors / Singer of Wagner ...

www.marineinsight.com/naval-architecture/types-rudders-used-ships

May 9, 2017 ... Learn about the main types of rudders used for ships in the article inside. ... the stern, and also a few hydrodynamic factors that dictate the flow of water aft .... the direction of the thrust too, then we don't actually need a rudder.

steamcommunity.com/sharedfiles/filedetails/?id=471792296

Jun 30, 2015 ... This can be achieved with the use of a rudder, means of lateral thrust ... This is both the most basic and the most centric role; a ship whose purpose is that of combat is ... Combat support ships don't tend to become necessary until later on in a .... It's no surprise how this "ship" will be balanced in the water.