Energy services firm Petrofac has hailed the start of gas injection for a giant project to deliver energy from Russia to Turkey.
The world's largest vessel is to lay more than 900km of gas pipeline linking Russia to southern Europe.
Turkey has granted Russian energy firm Gazprom permits for the revived TurkStream project.
Russian oil producer Gazprom has almost halved the planned capacity of its TurkStream gas pipeline project, according to the company’s chief exec. The expected capacity has been reduced from 63billion cubic metres (bcm) to 32bcm. Chief executive Alexei Miller said Gazprom now plans to supply a smaller amount because it also wants to expand the Nord Stream gas pipeline which runs on the bed of the Baltic Sea to Germany.