Floating tunnel (Aug, 1971)

Floating tunnel

A ship-to-shore roadway or an emergency bridge—this big, flexible plastic tube can be either. Inflated and fitted with air-lock doors at each end, it floats, supporting people (faintly visible, near right) or a hovercraft (far right). Heavier tubing could float a truck.

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1. Bathers Sail While Floating (Nov, 1937)
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3. Amphibian Bicycle Can Travel on Land or Water (Dec, 1932)
4. “Boat Tunnel” for Harbor Crossing (Aug, 1932)
5. NEW CAR LOCK THWARTS THIEF (Sep, 1934)