A large number of aluminum single hull (monohull) boat designs (plans) that serve a variety of purposes. these include orcas, outbacks, sitkas, sportsters, sport. Power 1 : 16’x5’6’’ ply motor launch of ultra simple construction using pre-shaped ply hull panels, frames and transom. the chine joints are completed with. [cs25] the carolina sportfish 25 is an offshore boat based on the carolina sport fishing boats lines..