Shadow 

 .Zone 



Lines of Constant 

 Phase Difference 



Diffracted Wave Crest 

 from Right End 



Waves out of 

 Phase COS 90 = 



Waves in Phase 

 COS 0=1.0 



Diff^racted'Wave Crest 

 from Left End 



Breakwater, i-ZL 

 Incoming Wave Crest 



(a) Crest Pattern 



.^10 

 ^--1.0 



Breakwater, / = 3L 



K'„( Fig. 2-31 -Mirror Image) 



k'l (Fig. 2-35) 



Direction of 

 Wove Approach 



(b) Diffraction Coefficient Pattern 



Figure 2-59. Approximate method for computing wave diffraction 

 around an offshore breakwater. 



2-106 



