TABLE 5. SEA AMOUNT 



Code 





 1 

 2 

 3 

 4 

 5 

 6 

 7 



Mean Max. Height 



of Sea Waves 

 in feet (Approx. ) 







- 1/3 

 1/3 - 1-2/3 

 1-2/3 - 4 



4-8 



8-13 

 13 - 20 

 20 - 30 

 30 - 45 

 over 45 



Description 



Calm (glassy) 



Calm (rippled) 



Smooth (wavelets) 



Slight 



Moderate 



Rough 



Very rough 



High 



Very high 



Phenomenal* 



* As might be expected in center of hurricane 



TABLE 6. SWELL AMOUNT 



Code 



Approximate 

 Height 

 (feet) 



Description 



Approximate 

 Length 

 (feet) 











No swell 







1 



1 to 6 



Low swell 



Short or 

 Average 



to 600 



2 



Long 



Above 600 



3 



6 to 12 



Moderate 



Short 



to 300 



4 



Average 



300 to 600 



5 



Long 



Above 600 



6 



Greater 

 than 12 



High 



Short 



to 300 



7 



Average 



300 to 600 



8 



Long 



Above 600 



9 







Confused 







102 



