You had to be able to draw a ship,and you had to be strong.The bottom of the ship was covered with copper.It took a year to build a ship.The ship also had thousands of parts.Everything was made by hand on the ship.The ships were built at the waters edge.Alot of people attended the ships first launch.Ship building became a big business in port cities like Boston,and Massachusetts.Also building a ship is complex.Also twenty to thirty craftsmen,from sail makers to rope makers,took part.