Table 4. 



Coefficients for estimating the 

 duration of wave crests. 



d/Lo 



d/gT2 



C2 



C3 



0.002 



0.00032 



0.1242 



0.00788 



0.005 



0.00080 



0.1784 



0.0205 



0.01 



0.0016 



0.2025 



0.044 



0.02 



0.0032 



0.2903 



0.0852 



0.05 



0.0080 



0.4036 



0.2058 



0.1 



0.016 



0.4702 



0.4529 



0.2 



0.032 



0.5442 



0.8268 



0.5 



0.080 



0.5518 



1.448 



1.0 



0.16 



0.5542 



1.4601 



2.0 



0.32 



0.5691 



1.363 



(m = 



= 0.5 for waves on a flat bottom 

 ,0). 



Table 5. Observed versus predicted relative crest 

 durations (monochromatic waves-sinusoidal 

 generator blade motion) . 



1/m 



Mean 

 value 

 of Ci 



Std. 



dev. 



of 



Cl 



Coefficient 



of 



variation 



of Cl 



(pet) 



No. 



of 



tests 



Source 



^ 



0.498 



0.042 



8.4 



23 



This study 



40^ 



0.53 



0.104 



19.6 



26 



Singamsetti 

 and Wind 

 (1980) 



20^ 



0.56 



0.11 



19.6 



24 



Singamsetti 

 and Wind 

 (1980) 



10 1 



0.70 



0.42 



60.0 



22 



Singamsetti 

 and Wind 

 (1980) 



5I 



0.91 



0.32 



35.2 



21 



Singamsetti 

 and Wind 

 (1980) 



^At the breaking point, 



28 



