The drive to build offshore wind in US waters will not just need ships; it will need a raft of port facilities to serve the sector as it takes off.

Recent weeks have seen port development efforts take shape on the north-east coast as maritime companies, offshore turbine manufacturers and project developers work to set up bases for future farms there.

And growing interest in offshore wind on the west coast will ultimately require port infrastructure as well in a region experiencing headline-grabbing port congestion.