H-II Transfer Vehicle
A total of 14 main pressurized modules were scheduled to be part of the ISS by its completion date in 2010. A number of smaller pressurized sections will be adjunct to them (Soyuz spacecraft (permanently 2 as lifeboats – 6 months rotations), Progress transporters (2 or more), the "Quest" and "Pirs" airlocks, as well as periodically the H-II Transfer Vehicle).