462 NICHOLAS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE

screw aperture to a deep floor above the lower deck, to which it is
strongly attached.

The rudder gudgeons are 4: to 5| feet apart, according to the size of
the vessel.

Fig. 51.—A Stern Frame.
In Fig. 51, A is the palm on the extended body post for connecting
frame to floor plate and transom plate; B is the arch piece, scarphed to
body post and to the stern post at C. D is the propeller shaft boss.
E the body post. His the sole piece, the end of which extends forward
and is connected to the hull by dishing, that is bending and shaping,
the keel plate against the sole piece to which it is riveted. The stern
frame and ite connections are made strong in order to counteract
the strain caused by the vibration and continual working of the
propeller.