Similar words: shudder, sudden, studded, suddenly, sudden death, all of a sudden, ladder, intruder. Meaning: ['rʌdə(r)] 
n. 1. a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes 2. (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel.
n. 1. a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes 2. (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel. 
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121. He who will not Be ruled By the rudder must Be ruled By the rock.
122. The closed loop gain shaping algorithm is applied to the rudder roll damping system.
123. The alignment and positioning of rudder and centerboard is also important. Otherwise you can't get correct data.
124. Azimuth rotating steering rudder and podded electric propulsion system is a novel marine propulsion system.
125. The theoretical calculation method about how to predict the hydrodynamic characteristics of Ichthyoid Rudder is proposed in this paper.
126. The big rudders would snap off if turned directly, but, as Fuller famously said, "just moving the little trim tab builds a low pressure that pulls the rudder around."
127. Mr. Superintend, the hole of the lower rudder pintle damaged. It needs to be bored.