Specmar inc (previously specialty marine contractors) is an aluminum boat design, and lofting company. we have a large product line including aluminum drift boats, aluminum landing craft, aluminum monohull boats, aluminum catamarans, aluminum special purpose boats, and aluminum ribs (rigid inflatable boat).. A large number of aluminum single hull (monohull) boat designs (plans) that serve a variety of purposes. these include orcas, outbacks, sitkas, sportsters, sport fishers, crew boats, crab boats, dive boats, and patrol boats.. I am looking for plans to build a 17 foot aluminum jon boat. if you know of any plans, books, or websites on this subject, i would very much appreciate it..