Conclusions 
Power spectra can be computed or determined electronically ina 
reliable statistical way which will yield valuable information on 
ocean waves. Two dimensional power spectra are also badly needed, 
but the one dimensional spectra, such as have been shown, have veri- 
fied many of the theoretical properties of the sea surface, which were 
derived in previous chapters. In particular, sea and swell records 
appear as predicted, and a quantitative spectrum of a pressure record 
yields correct values for the computation of the properties of the 
free surface and of the energy flux toward shore. 
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