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TITANIC THOMPSON Graving DOCK Belfast

For more check out - Link http://www.titanicmemorials.co.uk/pos... I've been living in Belfast for around 40 years and I didn't know you could actually do this! -Walk around on the bottom of the Thompson Graving dock where the RMS Titanic was built all those years ago in 1912 the same year my old mum long gone, was born! So here I am to give you the inside view of this massive dock which was the biggest in the world at that time! The Thompson Graving Dock is located on the west-side of Queens Island in Belfast, within sight of the Harland and Wolff shipyard. The dock was constructed by the Belfast Harbour Commissioners and opened in 1911. It was designed to accommodate the new mammoth White Star liners Olympic and Titanic. The dock is 850 feet (259 metres) in length, exactly the length of the Olympic-class liners between perpendiculars; their waterline length. The sides of the dock are flush for half their height, while above the sides are stepped outwards. The landward end of the dock is curved, while the harbour-end is flat, with a large, movable caisson gate. The width of the dock floor measures 100 feet (30.48 metres), while at the caisson gate the width is 96 feet (29.26 metres), giving a margin of just 1 foot 9 inches (0.53 metres) either side of the dock gate for the transit of the Olympic and Titanic; the margin was even smaller for the 94 feet (28.7 metre) wide Britannic. The graving dock was a dry dock; the dock would be flooded to allow a ship to enter the dock. The caisson gate to the dock would be closed and the dock pumped dry. The ship had to be positioned exactly, so that she would come to rest on the keel blocks. With the dock dry, shipyard workers from Harland and Wolff could descend on the ship to work on her, fitting the ship out and working on her hull, propellers and rudder; parts of the ship that would normally be underwater. The Thompson Graving dock- What is a graving dock and what is it used for? The word ‘graving’ is an obsolete nautical term for the scraping, cleaning, painting, or tarring of an underwater body. Combined with the word ‘dock’ a graving dock refers to an enclosed basin into which a ship is taken for underwater cleaning or repair. Older graving docks were fitted with watertight entrance gates when closed permitted the dock to be pumped dry. However these gates, hinged on either side, restricted the size of vessels entering and the gates were also difficult to seal and to repair. Later designs of graving docks incorporated the use of a caisson or pontoon (sometimes called a camel by shipbuilders) that fitted closely into the entrance. The caisson is flooded and sunk in place and the water pumped out. Reversing the process the dock is flooded, the caisson pumped dry, floated and is warped away from the entrance to permit passage of vessels. A graving dock is sometimes called a graving dry dock or just dry dock. It is, however, not a dock. A dock is an artificial basin provided with suitable installations for loading and unloading, close to the sea, where vessels can lie afloat. The dock area may communicate freely with the stream or harbour, or the entrance to it may be closed by a lock or gates.