In 1794 Congress decided they needed Navy and passed the Naval Act of 1794. This act funded the money for six ships. One of the first ships was the USS United States. The USS United States was 174 ft long and went 13.5 knots.(About 15 miles per hour!) It was a 44-gun Frigate, built in Philadelphia and launched on May 10, 1797. This ship had a poop deck and a round house on its stern.
A present day Navy ship is the USS Boone. It is around 400-460 ft! They now go about 29 or more knots(33 mph or more) Present day ships have changed in a few way. Now they have more weapons and missionary, and alot more crew members. They have kept a few things, but improved basic needs such as size and speed. A similarity is that both the old and new ships transported goods all around the world to foreign places!