180' 



240' 



3CC" 0° 60° 



Orientation Angle, a 



20'^ 



180° 



Figure 25. W(a) for four different crests, and curves fitted by symmetric 

 series method. Test conditions: d = 1.00 foot, G = 25 feet, 

 2a = 0.25 foot; see Table 6 for wave conditions. 



47 



