of SouthStream Transport B.V's dual Turkish Stream pipeline in the Black Sea. The pipeline construction started in May 2017 and was completed in November 2018. Starting from the Russian coast near the town of Anapa, the , diameter twin-pipeline will traverse the Black Sea at depths up to and emerge onshore in Turkey's Thrace region. She has installed three out of four platform topsides for phase one of the Johan Sverdrup development in offshore Norway. The drilling platform (DP) topside was installed in June 2018. The other two topsides named P1 and LQ were installed in March 2019. With P1 topside weighing 26,000 tons, this is one of the heaviest single-lift executed offshore to date, after Wheatstone of 36,000 ton and Arkutun Dagi of 42,380 ton, both with the H 851. The vessel is expected to return in 2022 to install P2 topside weighing 27,000 tons for phase two of the Johan Sverdrup development. It removed Valhall QP topside for Aker BP in June 2019. This structure was an accommodation platform in Valhall field, located in southern part of North Sea about 280 km off the Norwegian coast. Weighing 3800 ton, it is the lightest lift operation performed by the vessel. In June 2019, Pioneering Spirit also removed the Brent Bravo 25,000-tonne topside located 186 km off the coast of Scotland on the way to Norway. She was also scheduled to remove the remaining two Brent field topsides for Shell, the 15,000 tonne Brent Alpha and 29,500 tonne Brent Charlie. Future designs In 2018, Allseas announced its intention to build an even larger version of Pioneering Spirit, named Amazing Grace, scheduled to be delivered in 2022. However, in July 2020, Allseas announced that it would suspend the project indefinitely. References External links The original concept from 1989 ''Pioneering Spirit". Allseas Pieter Schelte - "The project commences". (PDF). Allseas Group Pieter Schelte Cylinders Video Ships of the Netherlands Crane vessels Pipe-laying ships 2013 ships Individual catamarans