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Solitaire undergoes major upgrade work in Rotterdam that significantly increases her pipelaying capability and doubles her pipe holding capacity; the near four month project prepares her for the deepest pipelay projects in the world

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Allseas cements its reputation as the technically best and most reliable pipelay contractor in the world; a reputation only enhanced by Solitaire's 2005 upgrade
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The company buys the 80 m long survey vessel
Manta
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After 15 years of service
Trenchsetter is retired from service and replaced by the newly converted
Calamity Jane
- In July 2005 Allseas purchases the 222 m long bulk carrier "Geeview" for conversion to the fleet's latest DP pipelay vessel, Audacia

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Working on the Atwater Valley project in the Gulf of Mexico in 2006, Solitaire and Lorelay set another water depth world record, laying 8 inch and 10 inch pipelines to a depth of 2,775 m (9,105 ft)
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The same year, Solitaire lays a 24 inch pipeline in 2,500 m (8,202 ft) water depth
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In late 2006 a settlement is agreed with Sembawang Shipyard in the dispute over Solitaire's conversion
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Audacia is christened following a successful construction period

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After nearly a quarter of a century of design and planning Allseas officially announces its plan to build the platform installation / decommissioning and pipelay vessel
Pieter Schelte; long-lead items such as the thrusters and DP system are ordered
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The number of people the company employs onshore and on the vessels tops 2,000 for the first time
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Audacia successfully executes her first pipelay project in the North Sea for Shell
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In 2008 the company orders the high-tensile steel for the jacket and topsides lift systems of Pieter Schelte
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The company opens a new office in Mumbai, India, in March 2009, with the objective of enhancing the group's installation engineering capabilities
- Solitaire executes Allseas' first South American project in late 2009, the Straight of Magellan pipeline offshore Argentina for Transportadora de Gas del Sur

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Detail design of Pieter Schelte is awarded to Deltamarin and the company announces that construction will start in 2010