For the wave-breaking slopes or i^ave dampers whose effectiveness 

 is somewhat increased by the roughness of the rock fill, it generally 

 suffices to give them the limiting slope i - T/A V h/g under the 



condition H Q = z ^ 2h, because if the height of the reflected wave 

 is reduced to less than half of that of the incident i» T ave its energy 

 is reduced to much less than 1/4 part. 



All the foregoing confirms our criteria, according to which in 

 order to get acceptable approximate solutions for the complicated 

 subjects of the maritime technician the enthusiastic and frank 

 collaboration of theorists, technicians and laboratories is necessary. 



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