Push button drawings that are created without the use of a commercially available cad system. These drawings are automatically generated within Disasu's Knowledge Based design system for manipulation and exportation into other cad systems that will accept a "dxf" format.  This first generation of the vessel drawing is a starting point for the bid drawings to be used later.  Included on the drawings are full scaled dimensions, nozzle and stiffener mark numbers, dimensions based on tangent to tangent or seam to seam points.