News: Docking times on Saturday posted on April 26, 2002 The Soyuz 4 Taxi Flight is slated to dock with the ISS at 07.57 GMT (9.57am SA) on Saturday, with hatch opening about 0920 GMT (11.20am SA). The taxi crew is delivering a new Soyuz spacecraft to the station and will return to Earth in the old Soyuz. The Soyuz spacecraft, which serve as the station's crew return vehicle, are swapped out every six months.