produced by sinusoidal motion of the piston-type generator blade. The ranges 

 of dimensionless water depths (water depth at the toe of the structure divided 

 by structure height, dg/h) tested with monochromatic waves are given in Table 1. 

 Major emphasis was placed on d/gT^ = 0.016 because laboratory waves at this 

 value of relative depth are comparatively free from secondary and Benjamin-Fier 

 waves . 



Table 1. Range of conditions tested with 



monochromatic and irregular waves. 





Monochromatic waves 





Breakwater 



h 



d 



Irregular wave 

 testing^ 



(range) 



(range) 



BWl 



0.6 to 1.2 



0.0065 to 0.055 



L 



BW2 



0.87 



0.013 to 0.079 



N 



BW3 



0.69 to 1.4 



0.0038 to 0.037 



N 



BW3W 



0.69 to 1.3 



0.0065 to 0.08 



N 



BW4 



0.68 to 1.3 



0.0065 to 0.055 



L 



BW4W 



0.76 to 1.3 



0.0065 to 0.055 



L 



BW5 



0.92 to 2.3 



0.0065 to 0.055 



L 



BW6 



0.75 to 1.3 



0.0056 to 0.055 



L 



BW7 



0.98 to 1.63 



0.0065 to 0.055 



N 



BW8 



0.64 to 0.86 



0.016 



N 



BW9 



0.64 to 1.1 



0.0065 to 0.055 



L 



BWIO 



0.68 to 1.1 



0.0065 to 0.055 



L 



BWll 



0.51 to 0.75 



0.0065 to 0.055 



N 



BW12 



0.64 to 1.1 



0.0065 to 0.055 



N 



BW13 



1.1 to 1.8 



0.0038 to 0.055 



L 



BWl 4 



0.91 to 2.0 



0.0038 to 0.055 



L 



BW15 



0.61 to 1.4 



0.0039 to 0.055 



L 



BW15W 



0.91 to 1.5 



0.0038 to 0.055 



L 



BW16 



0.61 to 1.8 



0.002 to 0.055 



E 



BW17 



0.58 to 0.83 



0.001 to 0.022 



E 



^Testing: E = extensive; L = limited; N = none. 



Breakwaters BW16 and BW17 were tested extensively with a wide variety of 

 irregular wave conditions. A limited number of irregular wave runs were also 

 made for several other breakwaters (Table 1) . 



7. Test Results . 



Test results for monochromatic and irregular wave conditions are presented 

 in tabular form in Appendixes C and D; monochromatic results are presented in 

 graphical form in Appendix E. 



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