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In 1995 Lorelay installs her first deep water pipelines, in the Gulf of Mexico, marking the start of an era in which Allseas positions itself as the most prominent deepwater pipelay contractor in the world
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Allseas celebrates its 10th anniversary by passing the 2,000 km mark for pipeline laid, and 1,000 km mark for pipeline trenched
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The Solitaire conversion contract is terminated with the Sembawang Shipyard in Singapore
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In 1996 Lorelay sets a new world record for deep water pipeline installation, laying a 12 inch rigid steel pipe in 1,650 m (5,413 ft) water depth on the Mensa project for Shell in the Gulf of Mexico
- Solitaire arrives in Newcastle, UK, for completion of her conversion

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Solitaire is christened, in Newcastle, in May 1997 and in 1998 lays her first pipeline on the Europipe II project for Statoil in the North Sea
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In 1997 the company also purchases the 300 t heavy duty floating derrick Tog Mor for conversion into a shallow water pipelay barge for shore approaches

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The eight man rowing sloop Jan Snoek, the smallest vessel in the fleet, is purchased; manned by Allseas personnel, the sloop continues to compete in regattas throughout the Netherlands and has recorded countless victories over the years
- By 1999 the company employs over 1,300 people in the offices and on the vessels

- At the end of the decade the company celebrates its first contract awards in offshore Canada
- A new company, "Excalibur Engineering", is founded in the Netherlands to focus on further development of the Pieter Schelte concept
- Allseas ends the decade as the contractor with the highest total of deepwater pipe installed in the Gulf of Mexico in 1999
