Uncrewed spaceflights to the International Space Station

The other spacecraft — the Japanese HTV, the SpaceX Dragon (under CRS phase 1) and the Northrop Grumman[1] Cygnus — rendezvous with the station before being grappled using Canadarm2 and berthed at the nadir port of the Harmony or Unity module for one to two months.

This is because these vehicles remain physically attached to the station longer than indicated when counting the time between initial SSRMS capture and release.

The Progress spacecraft is the most frequent cargo ship sent from Baikonur to the station, bringing supplies such as food, fuel, gas, experiments, and parts.

Located in Japan on an island 115 kilometres (71 mi) south of Kyūshū, the Tanegashima Space Center (TCS) is the launch site for H-II Transfer Vehicle (HTV), called Kounotori (こうのとり, Oriental stork or white stork), used to resupply the Kibō Japanese Experiment Module (JEM) and the ISS.

Cape Canaveral Space Force Station, located in Florida, United States, has been operational since 1950 with its first orbital launch occurring in 1958.

Under contract with NASA, SpaceX launches the Dragon 2 Cargo variant spacecraft to resupply the American portion of the ISS.

The Mid-Atlantic Regional Spaceport, located at Wallops Island, Virginia, United States, is the launch site for the Northrop Grumman Cygnus spacecraft for resupplying the American portion of the ISS.