During three trips in the Lunar Roving Vehicle, astronauts Young and Duke covered 16.8 miles over the lunar highland surface. They spent nine hours and seven minutes on foot conducting scientific experiments while Mattingly was conducting lunar science experiments from lunar orbit. Lunar liftoff occurred after 71 hours, two minutes on the Moon. Rendezvous and docking were normal. The Command Service Module Casper began its return to Earth after completing 64 lunar orbits. The astronauts landed safely in the Pacific after a mission of 265 hours, 51 minutes.