The first truly successful container shipping company dates to April 26, 1956, when American trucking entrepreneur McLean put 58 "trailer vans" later called containers, aboard a refitted tanker ship, the , and sailed them from Newark, New Jersey to Houston, Texas. Independently of the events in Canada, McLean had the idea of using large containers that never opened in transit and that were transferable on an intermodal basis, among trucks, ships, and railroad cars. McLean had initially favored the construction of "trailerships"—taking trailers from large trucks and stowing them in a ship's cargo hold. This method of stowage, referred to as roll-on/roll-off, was not adopted because of the large waste in potential cargo space on board the vessel, known as broken stowage. Instead, McLean modified his original concept into loading just the containers, not the chassis, onto the ship; hence the designation "container ship" or "box" ship. (See also pantechnicon van and trolley and lift van.)