sentences:  The type certificates for the Skyship 600 series was purchased from Westinghouse Airships in 1994 by American company Global Skyship Industries, transferred to Skycruiser Corporation in 2004 and changed hands again in 2012 to Skyship Services.Most Skyship 600s have been used for advertising purposes, like 600-05 which flew in 2006-7 as "Spirit of Dubai".A purpose built Skyship was used to promote the Division Bell tour by Pink Floyd in 1994 until the ship's destruction.