On command from Russian flight controllers, the Progress 6 vehicle undocked from the aft port of the Zvezda Service Module at 11:43 a.m. CST (1743 GMT). Expedition Four Commander Yury Onufrienko watched the undocking from the Pirs Docking Compartment and Flight Engineers Dan Bursch and Carl Walz monitored the departure from the Destiny Lab's robotics workstation.
The Progress' engines performed the first of two separation maneuvers within minutes of undocking. Flight controllers plan to deploy a small Russian student science satellite from the Progress later today before the resupply craft is commanded to deorbit and burn up in the atmosphere.
At the Baikonur Cosmodrome in Kazakhstan, preparations are complete for Thursday's launch of the new Progress 7 spacecraft, which will carry several tons of food, fuel and supplies to the ISS. The Progress 7 craft will link up to the ISS on Sunday afternoon.