Orbital handoff
At the edge of night, a cargo tug slips out of parking orbit carrying less propellant than old mission planners would have accepted. It leaves lighter because part of the mission is already waiting for it: relay nodes, precision timing, synchronized sensing, service platforms, and coordinated control spread across the route ahead. The craft is still bound by real constraints, but it is no longer hauling all of its fate onboard. It is entering a managed medium.
At first, that handoff looks ordinary: navigation, timing, sensing, correction, and power placed where the mission needs them. But as the infrastructure matures, the mission changes shape. The craft becomes one participant in a larger stack: vehicle, route, field, timing reference, sensing layer, and correction loop moving together.