rudder-fish - significado y definición. Qué es rudder-fish
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Qué (quién) es rudder-fish - definición

DEVICE TO STEER AN AIR OR WATER VEHICLE, USUALLY STERN-MOUNTED
Tail rudder; Rudder post; Rudder stock; Aircraft rudder; Rudders; Sternpost rudder; Stern rudder; Rear rudder; Water rudder; Rudder (aircraft); Rudder (aeronautics)

rudder-fish      
n.
Pilot-fish.
rudder         
(rudders)
1.
A rudder is a device for steering a boat. It consists of a vertical piece of wood or metal at the back of the boat.
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2.
An aeroplane's rudder is a vertical piece of metal at the back which is used to make the plane turn to the right or to the left.
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Fish (cryptography)         
ALLIED CODENAME FOR ANY OF SEVERAL GERMAN TELEPRINTER STREAM CIPHERS USED DURING WORLD WAR II
Fish cyphers; Fish ciphers; Fish (cipher); Fish (cypher); FISH (cryptography)
Fish (sometimes FISH) was the UK's GC&CS Bletchley Park codename for any of several German teleprinter stream ciphers used during World War II. Enciphered teleprinter traffic was used between German High Command and Army Group commanders in the field, so its intelligence value (Ultra) was of the highest strategic value to the Allies.

Wikipedia

Rudder

A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally air or water). On an aircraft the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn the airplane. A rudder operates by redirecting the fluid past the hull or fuselage, thus imparting a turning or yawing motion to the craft. In basic form, a rudder is a flat plane or sheet of material attached with hinges to the craft's stern, tail, or after end. Often rudders are shaped so as to minimize hydrodynamic or aerodynamic drag. On simple watercraft, a tiller—essentially, a stick or pole acting as a lever arm—may be attached to the top of the rudder to allow it to be turned by a helmsman. In larger vessels, cables, pushrods, or hydraulics may be used to link rudders to steering wheels. In typical aircraft, the rudder is operated by pedals via mechanical linkages or hydraulics.