Boat plans for the 13 this 13′ flat bottom skiff is a real workboat. it is so easy to build that you can build it in a day (maybe add a few days for fairing and. The aluminum boat design (plan) for our 7.7 meter rib comes with a ob (hull 1311) or io (hull 1211) option. at 3,800 lbs. displacement with 75 gallons of fuel, at 250. Wooden boat plans and kits. many boat plans are offered online. at first everything is very confusing, then you start to get some idea of the different types of boats.