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After Peak Construction, Stern frame is either cast, fabricated or forged, Rudder Trunk features - watertight - provides passage of rudder stock to steering gear - has inspection manhole, Stern Tube features - houses propeller shaft and bearings - oil or water (old practice) lubricated, After Peak Arrangement consists of Solid floor, After Peak Arrangement consists of Stern Tube, After Peak Arrangement consists of Centreline longitudinal wash bulkhead, Centreline longitudinal wash bulkhead features - stiffened by vertical stiffners & girders - reduces free surface effect, After Peak Arrangement consists of Stern frame, After Peak Arrangement consists of Rudder Trunk, Stern frame has For single screwship - a boss on the centreline for the tailshaft to pass through and an adequate aperture is provided for the propeller to operate in.