This allowed Progress 34P to dock at the SM aft port on 29 July 2009 .
The spacecraft swapped its docking ports at the International Space Station from Zvezda SM aft port to Pirs DC nadir port on 2 July 2009 .
This allowed Progress 34P to dock at the Zvezda SM aft port on 29 July 2009 .
The spacecraft swapped its docking ports at the International Space Station from Zvezda SM aft port to Pirs DC nadir port on 2 July 2009 .