Using binoculars, Hart scanned the castle and the mountainside on which it perched. Weberschloss was nearly inaccessible. A switchback road led through the forest and up the mountain, but it was unpaved and narrow, too unstable for more than a light car. A hovercraft, with its lower ground pressure, would be able to handle the surface; but it would be noisy. She wasn’t sure it would be able to take some of the tighter turns, and some of the grades were so steep that a hovercraft would probably spill the air from its skirts and end up grounded.