While the proposed Nantucket Sound wind farm continues to grab headlines and attract political attention, two underwater tidal energy projects that flank either side of [Martha's] Vineyard are quietly progressing.

"Massachusetts presents an interesting challenge. One of the first things we need to do now is to find out whether the state is going to be supportive of this type of renewable energy. That's really the critical path at this point." -- Charles Cooper, Vineyard Sound tidal energy project, permitting consultant