While offshore wind, especially floating deep offshore designs just beginning to be tested, offers great promise for reliable electrical generation out of earshot of communities, there remain several key technical hurdles to overcome.  In addition to needing more ships that can transport and install offshore turbines and vastly expanded transmission lines, a key concern is that wind turbines can interfere with radar signals, raising concerns about national defense implications of widespread offshore wind development.  The Department of Homeland Security and the NOAA are soliciting proposals for new techniques that could be used to accurately assess the extent and degree of radar interference by offshore wind farms.  The proposal affirms that the “intent is not to impede the propagation of wind turbines but to discover a means to co-exist.”