Norway's Eidesvik Offshore plans to become the first shipowner to convert an existing vessel to use an ammonia-fuelled engine.

The company is teaming up with technology giant Wartsila to retrofit a new system to one of its dual-fuel offshore vessels, which currently is fuelled by either LNG or conventional marine fuels.

The vessel has not been identified but the companies said a provisional target date for completion is the end of 2023.