Boa Offshore CEO Helge Kvalvik has revealed the inside story of the raising of the sunken Norwegian warship Helge Ingstad.

The vessel sank on 8 November following a collision with a Tsakos tanker in Hjeltefjorden on the west coast of Norway, substantially damaging its starboard side.

“This has been one of the most complex and successful salvage operations in the industry,” Kvalvik said.