are obtained by a judicious combination of Fourier Integral 
theory, stationary time series theory, and statistical methods. 
The stationary time series concepts and the statistical methods 
apply to the wave system as a whole as if it were to last for- 
evere Small pieces of the wave system when analyzed as wave re- 
cords can be treated as if they were samples taken from a station- 
ary process, and the statistical methods appropriate to such a 
treatment are valid. The concepts of Fourier Integral theory 
apply to the propagation of the system and to the fact that it 
lasts only for a given number of hours and is generated over a 
fetch of finite length. 
= 17285 
