What does "Undefined section normal at station..." mean?
This error means the SEA command was not able to define the orientation of a hull section. The orientation of each hull section is defined in 3D space using a normal vector which is computed using three points from the section. If a section has less than three points, or if the points were somehow destroyed in some way, this error will occur. Check the station that is indicated by the error and correct any issues.
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