The following tabulations are to be used with Table 8-7. The first lists 

 the number of hours waves of a particular height were present at the structure 

 site. (For example, for waves 7 meters high, with a 12-second period from 75 

 degrees north (from Table 8-7), wave height at the structure was between 7.088 

 and 6.645 meters for 1 hour. Therefore, wave height was above 7 meters for 1 

 X 0.088/(7.088 - 6.645) = 0.199 hour. Wave height between 6 and 7 meters was 

 1 - 0.199 = 0.801 hour.) The second tabulation sums hours for a given wave 

 height and associated frequency. Note that the total hours of waves less than 

 3 meters high is given, although the listing for these waves is either 

 incomplete or not given; these totals were obtained by completing the 

 calculations using the data in Table 8-7. 



8-42 



