Emirates Spinnaker Tower Emirates Spinnaker Tower The Emirates Spinnaker Tower is a landmark observation tower in Portsmouth, England, UK. It is the centrepiece of the redevelopment of Portsmouth Harbour, which was supported by a National Lottery grant. Its shape was chosen by Portsmouth residents from a selection. The tower, designed by local firm HGP Architects and engineering consultants Scott Wilson and built by Mowlem, reflects Portsmouth's maritime history through its being modelled after a sail. The tower was opened on 18 October 2005. The tower is owned by Portsmouth City Council, but operationally it is managed by Continuum Leading Attractions, a cultural attractions
Spinnaker raise the sail up the mast. Symmetric spinnakers have the windward clew secured to a spinnaker pole. The pole is attached to the mast and holds the windward edge of the sail in position. Lines that control the spinnaker pole are called "guys" or "braces". The spinnaker pole may be allowed to raise and lower with the force of the wind, or it may have lines attached to it to raise (the "topping lift") and lower (the "foreguy" or "downhaul") the angle of the pole. If these lines are used, they are generally set up before setting sail, and left