Emirates Spinnaker Tower two large, white, sweeping metal arcs, which give the tower its spinnaker sail design. The steelwork was fabricated by Butterley Engineering. At the top is a triple observation deck, providing a 360° view of the city of Portsmouth, the Langstone and Portsmouth harbours, and a viewing distance of . The highest of the three observation platforms, the Sky Deck, has only a wire mesh roof, so visitors are open to the elements. The windows extend above head height, so it is not possible to get a view unobstructed by glass. A glass floor is located on the first viewing deck
Spinnaker Software each. The Windham Classics corporation went defunct circa 1985/86 or later. The Telarium Corporation went defunct in 1987. In response to a severe, if temporary, downturn in consumer purchases of personal computers in the mid-to-late 1980s, and the shift in the market from more entertainment-oriented machines from Commodore and Atari toward more small business and personal productivity software running on IBM PC clones, Spinnaker decided to phase out its educational and entertainment titles and focus on personal productivity. In 1985 Spinnaker created the "BetterWorking" brand of productivity software for adults. In 1990 Spinnaker bought Springboard, creator of Springboard Publisher and