The Zeppelin Lines

Three coloured airship loops — Vermillion, Azure, and Amber — that circle the Vale on fixed rounds, docked and boarded in the flesh like any ferry.

A zeppelin is not a spell and keeps no secrets: it flies its loop whether you ride or not, and the schedule only tells you where the deck will be docked. The Vermillion runs the high road — Valenfeld to Highbridge to the sky-city Aelvyrenn; the Azure works the wet south through Siltmouth to Sresh-Dar; the Amber climbs from Hollowfold to the drifting isles. A red hull IS the red line. Fare is paid in gold at the master's booth, and the crossing is made in the air, weather and all.