A committee of the National Academies will assess potential impacts from offshore windfarms in the Nantucket Shoals region on marine hydrodynamics and resulting impacts on marine mammals, specifically on the availability of North Atlantic right whale prey. The study will include a literature review, an evaluation of the applicability of existing hydrodynamic models to the Nantucket Shoal region, and recommendations on measures needed to detect and assess changes in hydrodynamics due to the interactions with windfarms that may impact the surrounding ecosystem.