August 17, 1807 (on July 14 Dingmao), ships first put into commercial use in the world.

1807 08 17 - ship in the world for the first time in commercial use, as a New York City ferry.
John Stephenson, built in 1804, has the world's oldest ship propeller. Propeller steam engine speed is too low, so that the propeller or wheel paddle better.
1807, he built a pulley paddle steamboat "Phoenix". "Phoenix" sailed along the coast from New York Philadelphia shakedown storm encountered on the way. "Clermont" steamboat but after 13 days of sailing or safely arriving in Philadelphia, this is the first time in the world on ships sailing in the sea. the
Comments: maritime transport is the transportation industry's leading ship is the main means of transport. Inconceivable ships transport, is what