wo Russian cosmonauts replaced a video camera and did other work to prepare for the docking of unmanned spacecraft during a seven-hour spacewalk outside the International Space Station Tuesday.
Wearing new Russian-issue Orlan spacesuits, Fyodor Yurchikhin and Mikhail Kornienko ended their spacewalk outside the ISS's Russian Rassvet, Zarya and Zvezda modules around 1100 GMT.
They focussed on an automated rendezvous system that helps guide unmanned spacecraft to dock with the ISS when they deliver cargo, dpa reported
They installed a new video camera to monitor the dockings of unmanned supply craft such as the Progress and European ATV vehicles. The old camera was jettisoned into space away from the ISS.
The astronauts also hooked up cables on the new Russian module Rassvet, which was delivered by the space shuttle Atlantis in May.
Ground crews said the spacewalk had been completed successfully and had been particularly work intensive, Russia's Interfax news agency reported.
It was the fourth spacewalk for Yurchikhin and the first for Kornienko, the US space agency NASA said