Strange Seas - Stranger Lands
Guild of Navigators
Traversing the skysea is dangerous at the best of times, and getting lost is a considerable one of those dangers. The higher you travel, the faster you can sail, but the greater the risk of loosing your bearings. But if you can afford their services the Guild of Navigators will guide you.
They alone have the magical skills needed to safely find your way across the skies, but their service-charges reflect their monopoly.