swiveling the nacelle by the nacelle swiveling mechanism based on a wind direction obtained from {HEAD ~ a measurement result} of {TAIL ~ the anemoscope} when a wind speed obtained from a measurement result of the anemometer exceeds a first threshold which is lower than a cut in wind speed; and 
of
swiveling the nacelle by the nacelle swiveling mechanism based on a wind direction obtained from { HEAD ~ a measurement result } of { TAIL ~ the anemoscope } when a wind speed obtained from a measurement result of the anemometer exceeds a first threshold which is lower than a cut in wind speed ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH