(note: both the heritage 15 and the heritage 18 can be rigged for either single or double rowing) what are the advantages of a heritage skiff over a rowing shell?. Dinghy designs & plans for rowing skiffs & gigs (plywood – stitch & tape & strip plank). Bay skiff 12 was designed for a hardware store owner in st. michaels, md. he wanted a handy-sized skiff for rowing and sailing. the bay skiff 12 is stable and will.