Sky Island Trading Routes and Airship Economy Expansion System, Trade travels through drifting islands suspended above endless cloud layers. A small vessel and limited cargo space are all that stand between risk and opportunity. Early progress depends on spotting price gaps and moving goods through shifting aerial paths without wasting time or resources.
As expansion continues, short trips evolve into structured supply lines linking distant hubs. The ship gradually becomes part of a wider economic flow, with upgrades and routing systems shaping how efficiently everything runs. Full progression unlocks deeper mechanics that extend beyond simple buying and selling.