In offshore wind vessel sector, when does the Jones Act kick in?

Delivering supplies and crew to wind farms in US waters will require ships that qualify under the Jones Act.

That means they will have to be built by a domestic shipyard, controlled by a US company, crewed mostly by Americans and registered under the US flag.

But constructing wind farms off the US coast is less clear cut, and questions about when to use a US-flag ship and when it is not required remain unanswered.