Home / boat plans & kits catalog / aluminum all designs for aluminum construction are included read our free article on aluminum boat. Specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kt company. we have a large product line including aluminum drift boats. A large number of aluminum single hull (monohull) boat designs (plans) that serve a variety of purposes. these include orcas, outbacks, sitkas, sportsters, sport.