Soyuz-TMA 6

Cosmonauts:
    Upload:
        Sergei Krikalyov [6], Commander
        John Phillips [2], Flight Engineer) (USA)
        Roberto Vittori [2], Flight Engineer (Italy/ESA)
    Download:
        Sergei Krikalyov
        John Phillips
        Gregory Hammond Olsen
Backup:
    Mikhail Tyurin
    Daniel Tani (USA)
    Robert Thirsk (Canada)
Launch:
    Date: 15 April 2005
    Time: 00:46:25 UTC
Landing:
    Date: 11 October 2005
    Time: 01:09:48 UTC
Duration: 179 days, 0 hours, 23 minutes, 23 seconds
Docked: 17 March 2005 - 10 October 2005
Call Sign: Basalt

Soyuz-TMA 6 was the replacement for Soyuz-TMA 5 The Soyuz is used as a lifeboat for the ISS. Because of fuel degradation, the Soyuz needs to be replaced every six months.