Carries internal logistics and resupply cargo for station outfitting. Carries external Russian cargo crane to be mounted to exterior of Russian station segment and used to perform spacewalking maintenance activities. ITS Z1 is an early exterior framework to allow first U.S. solar arrays on flight 4A to be temporarily installed on Unity for early power. Lab installation on 5A. Ku-band communications system. Provides Russian assured crew return capability without the Space Shuttle present.
Station begins permanent human presence.
Integrated Truss Structure P6. First PV module installed temporarily on Z1 truss until after 13A when can be moved to P5 truss. Provides initial US user capability. Launched with 5 system racks already installed inside of the module. Control Moment Gyroscopes are activated with delivery of electronics in lab, providing electrically powered attitude control.