Topic-4 Drafting of hull form

The length between perpendiculars is divided into equal divisions to draw a section at each of these divisions. These sections are numbered from AP  to FP . Quarter and half stations are also taken at the ends to define the hull form more accurately. Using the offset table obtained at C_B, a preliminary half breadth is prepared. By fairing the lines in the half breadth plan, a preliminary body plan is prepared. A half transverse section only is drawn since the vessel is symmetrical about the centerline plane. The forward half sections are drawn to the right of the centerline with the aft sections to the left. The outreaches of the stem and stern profiles are drawn in the elevation.

It is essential when designing the hull form of the ship that all the three sets of curves should be fair and coincident with each other and their interdependence becomes important in the fairing process. At the end of the fairing process, lines are faired in all three views and final lines plan is prepared.