宇宙ステーション補給機
When the Space Shuttle flew the Multi-Purpose Logistics Modules (MPLMs) to the station, the MPLM would be temporarily berthed to the nadir mechanism of "Harmony". The Japanese H-II Transfer Vehicle and the American Commercial Resupply Service (COTS) vehicles, Dragon and Cygnus, are temporarily berthed to either the nadir or zenith mechanism.