Preparations are underway to offload the 212-foot-long Space Launch System (SLS) rocket core stage pathfinder from NASA's Pegasus Barge at Kennedy Space Centers Launch Complex 39 turn basin wharf on Oct. 1, 2019. From left, are Katherine River, operator, and James Erdman, observer, both are Launch Vehicle Technical Operations technicians with Jacobs TOSC. The Pegasus Barge made its first delivery to Kennedy in support of the agency's Artemis missions. The upgraded 310-foot-long barge arrived Sept. 27, 2019, ferrying the SLS core stage pathfinder, a full-scale mock-up of the rocket's core stage. It will be used by Exploration Ground Systems and its contractor, Jacobs, to practice offloading, moving and stacking maneuvers, using important ground support equipment to train employees and certify all the equipment works properly. The pathfinder will stay at Kennedy for approximately one month before trekking back to NASA's Michoud Assembly Facility in Louisiana.