stunning hassle to include this Screencast in this post!
I may be using this feature for what it was not intended. My part is made of many bodies including the ribs. Perhaps a different approach is required. Oddly the geometry i am attempting to create via the rib feature are called ribs in the physical apparatus (boat) hence the expectations of this feature:)
the design objective is to have a multibody part
ribs feature in Onshape works elegantly! normal or parallel to sketch plane, multibody, merge or not merge
File>Export and Attach *.f3d file here.