Airship Industries collapsed in 1990. Westinghouse Electric's defense arm had taken over the US Navy's airship programme in which Airship Industries was a partner and bought the military marketing rights and intellectual rights to the Skyship designs from the official receiver. Slingsby Aviation, which was the principal subcontractor to Airship Industries bought other assets, marketing rights and intellectual property for civil versions along with the type certificates. Westinghouse purchased the Skyship 600S demonstrator, Airship International – who were to market the civil design in the Americas – bought two unfinished Skyships and Skyship 600-02, and took over the equipment of Airship Industries US arm.