There is a rudder with pintles on the leading edge, inserted into gudgeons. Really good installations (gudgeons) have bushings, (plain bearing) either a solid sleeve, flanged or clenched. Reaching her wits' end, she sent for a bucketful of stream water, complete with gudgeons. In Australia they are known as carp gudgeons. In buildings pintles and gudgeons are used for working shutters. This will allow for smoother operation of the helm and preserve the pintles and gudgeons. Fish in this family are known as "Gudgeons". On some boats there are split pins/split rings through the pintail to stop gudgeons lifting.