The quick method is designed to be both fast and robust because its main purpose is to draw the line on the 3D view in reset state. Consequently, it results in a crude catenary shape which ignores most effects, including buoyancy, drag, bending and torsional stiffness, and interaction with seabed and solids. In fact the position set by the quick method only allows for the line's average weight per unit length and axial elasticity, so it is not usually an equilibrium position (though for simple cases it may be quite close).
