Rudders come in all kinds of shapes and sizes. They can be balanced,
unbalanced, or semi-balanced, and vary depending on the needs of the vessel itself.
-Aspect Ratio: the ratio of the height of a vessel's rudder to its width
-Contra-guide: one type of rudder
-Pintle: the pin that holds the rudder in the gudgeon; similar to the bolt in a door hinge
-Gudgeon: the projecting lugs of the rudderpost which furnish support to the rudder; the slot or bracket
that the pintle slides into to attach it to the vessel
-Rudder palms: the horizontal flat surfaces where the upper stock joins the rudder
