This
option allows the spacing of sections to be changed by increasing or reducing
the number of polylines in the group. The number of sections can be either
specified directly or the spacing between sections can be defined. Apply
this option with the default values with make the distribution of section
curves uniform along the length of the hull. New sections are generated
by linearly interpolating between the points of the original set of hull
sections. For more detailed information, see the Change
Section Spacing Dialog