wave height, H/H^ = 1.0 in which case the maximum deviations could amount to 

 ±5 percent. The probable explanation for this deviation is that: (1) the calculated wave 

 heights for the tabulated cases were allowed to deviate from the desired values by 1 percent, 

 and (2) the different orders to represent different cases could cause a difference in 

 kinematics of 1 to 2 percent. The effects noted above could conceivably amount to 

 deviations of ±5 percent for those variables which are inherently nonlinear, e.g., drag forces 

 or wave breaking parameters. 



This completes the section illustrating the use of the wave tables. It should be recognized, 

 however, that only the more simple examples have been presented and that the tables can be 

 effectively applied to the solution of situations which are considerably broader and more 

 complex than those examined in this section. 



VI. SUMMARY 



This report presents the results of an investigation which has demonstrated that the 

 Stream-function wave theory provides a generally better representation of periodic wave 

 phenomena than other wave theories examined. As a result of this indication, tables have 

 been prepared, based on the Stream-function wave theory, that include parameters which 

 should be an aid in preliminary offshore design. The tables also include parameters which 

 are presently of greatest interest to researchers. 



Because of its simplicity, the Unear wave theory is widely used for many calculations over 

 all ranges of relative depth. This study has identified that, for a number of variables, there 

 are substantial differences between the linear and Stream -function wave theories. Although 

 tliis point has not been amplified in this report, inspection of the tables wiU substantiate this 

 conclusion. The identification of these differences should be of assistance in planning 

 experimental programs to provide definitive research results. 



If the set of tables is extensively applied, as is hoped, undoubtedly the users will note 

 shortcomings, omissions or develop recommendations directed toward the improved 

 usefulness, applicability, or efficiency of the tables. The author would welcome information 

 of this type so that future work may benefit by as wide a range of user's needs as possible. 



96 



