You must guide your ship around an arena populated by ever increasing waves of enemies. (appspy.com)
For intermediate surfers, we do an initial assessment of what goals you would like to achieve in the lesson such as increasing your wave frequency, style and technique. (shakasurfmorocco.com)
Under these circumstances, the reduced vertical stability in the N.H. helps generate increased wave energy that results in a very different stratospheric circulation and height / pressure response pattern. (giss.nasa.gov)