Table Gl.-The fifteen most-frequently olaserved comlDinations of wave period^ 

 height, and direction (from 30°-150°T) as ohserved at Chesapeake 

 Lightship duiring five representative years 



Combina- Period'^ Height 

 tion 



(sec) (ft) 



Direction from 



Wo 



. of 



which wave front 



oh 



serva- 



travels (°T) 



tions** 



150 





392 



60 





286 



60 





279 



90 





265 



150 





208 



90 





166 



60 





103 



60 





100 



30 





9h 



90 





93 



30 





79 



60 





75 



90 





50 



60 





k2 



30_, 





39 



1 k 1 



2 I|. 3 



3 U 1 

 k k 1 



5 i^ 3 



6 k 3 



7 h 5 



8 6 3 



9 ^3 



10 63 



11 k 1 



12 65 



13 61 

 Ik k 6 

 15 h 3 



*"Waves coded 2 (table 17, Ship's International Code) were considered as 

 ^-sec waves; those coded 3 were considered 6-sec waves. See explanation 

 in text and table G2. 



■'^*Total observations of waves capable of striking Virginia Beach 

 (traveling from 30° through I50 True) = 3OI6 



62 



