570 nautical miles

Having wonderfully completed her successful sea trails and on returning to Belfast at 19:00 the surveyor signed an "Agreement and Account of Voyages and Crew", valid for 12 months, which declared the ship seaworthy. An hour later, Titanic left Belfast again—as it turned out, for the last time—to head to Southampton, a voyage of about 570 nautical miles (660 mi; 1,060 km).