Select from 648 areas (10[deg.]grid)
  wave height-wave period    wave height-wave direction    wave period-wave direction  
 wind speed-wind direction    wave height-wave period-wave direction    wave height-wind speed  
 wave period-wind speed    wave direction-wind direction    wave height-wind speed-wave period   
  Annual   Spring   Summer   Autumn   Winter 

Click a sea area you want to display.
Then the scatter diagram is displayed in permillage.

Wave direction/Wind direction indicate a direction of wave/wind propagation.
(0[deg.] indicates North and 90[deg.] indicates East.)