Tham khảo tài liệu 'ship hydrostatics and stability 2010 part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Definitions principal dimensions 13 Sheer plan Body plan Sto St 1 St2 St3 St4 St5 Sts St 7 St8 Sts St 10 Waterlines plan Figure The lines drawing but making an angle with the horizontal. A good practice is to incline the plane so that it will be approximately normal to the station lines in the region of highest curvature. The intersection of such a plane with the hull surface is appropriately called diagonal. Figure was produced by modifying under MultiSurf a model provided with that software. The resulting surface model was exported as a DXF file to TurboCad where it was completed with text and exported as an EPS Encapsulated PostScript file. Figures to LIO were obtained from the same model as MultiSurf contour curves and similarly post-processed under TurboCad. Fairing The curves appearing in the lines drawing must fulfill two kinds of conditions they must be coordinated and they must be smooth except where functionality requires for abrupt changes. Lines that fulfill these conditions are said to be fair. We are going to be more specific. In the preceding section we have used three projections to define the ship hull. From descriptive geometry we may know that two projections are sufficient to define a point in three-dimensional space. It follows that the three projections in the lines drawing must be coordinated otherwise one of them may be false. Let us explain this idea by means of Figure . In the body plan at the intersection of Station 8 with Waterline 4 we measure that half-breadth y WL4 St8 . We must find exactly the same dimension between the centreline and the intersection of Waterline 4 and Station 8 in the waterlines plan. The same intersection appears as a point marked by a circle 14 Ship Hydrostatics and Stability in the sheer plan. Next we measure in the body plan the distance ẠButtockl St 10 between the base plane and the intersection of Station 10 with the longitudinal plane that defines Buttock 1. We must find exactly the
