On March 26, 2016 the American "Cygnus” (CRS OA--6 “Rick Husband”) private unmanned supply spacecraft was docked to the International Space Station (ISS). The Cygnus spacecraft was grappled by a robotic arm operated by astronauts inside the space station at 10:51 UTC. The cargo spacecraft was docked to the station’s "Unity” module at 14:52 UTC. The spacecraft delivered about 3300 kilograms of supplies to the Space Station. It was the 5^th docking of a "Cygnus” spacecraft with the ISS.