The N500 Naviplane was a French hovercraft built by SEDAM (Société d'Etude et de Développement des Aéroglisseurs Marins) in Pauillac, Gironde for the cross channel route.
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:First flight on April 19, 1977 on the Gironde, demonstrating a speed of 40-45 knots (74–83 km/h).