Spc. Charles Vincent prepares to assemble the mobile GNSS rovers, which are used to receive location and elevation coordinates from a satellite before transferring them to the stationary base receiver. The coordinate is then linked to the base receiver’s coordinates, averaged out, and sent back to the mobile rover. They are establishing the grade for a moving rail-target system at the non-standard live-fire range at Joint National Training Center, Cincu, Romania. This project is part of Resolute Castle 17, an operation to help build relationships with the NATO alliance and enhance its capacity for joint training and response to threats within the region.