13. (Conciuded). 



The LFI method was introduced by Sobey (1992) as a two dimensional method for interpreting a single water 

 surface measurement of irregular waves. In this dissertation, the two dimensional method is expanded to include the 

 analysis of subsurface pressure records. The method is then extended to the prediction of directional irregular wave 

 kinematics from the measurements of arrays of instnmients, including wave staffs and subsurface pressure gauges. 

 In this extended analysis, the LFI method includes nonlinear wave-wave interactions, in addition to the self-wave 

 interactions of the two dimensional form. Results of the analysis on theoretical, laboratory and field records are 

 provided. 



