Today’s a busy day in space! The crew (Parmitano & Misurkin) will conduct the second round of on-board training (OBT) to practice their roles in ATV docking, while, at ATV-CC, controllers will command the ATV docking probe to extend (it’s normally kept stowed and retracted during flight) to test that the mechanism is ready for contact!

ATV docking system via RussianSpaceWeb.com

ATV docking system via RussianSpaceWeb.com

There’s an excellent graphic animation showing how the Russian docking system used by ATV functions over at RussianSpaceWeb.com