Mitsui OSK Lines is to install wind propulsion systems on seven more newbuildings as it aims to have 25 vessels fitted with the technology by 2030.

The Japanese shipowner will fit six of its in-house-developed Wind Challenger systems to a series of three 42,000-dwt and three 58,000-dwt bulkers.

MOL said three vessels have been contracted at Japanese shipbuilder Oshima Shipbuilding, and preparations are underway for the remaining newbuilding contracts.