TABLE 5. SEA AMOUNT 



Mean Max. Height 

 of Sea Waves 



Code 



in feet (Approx.) 



Description 





 1 

 2 

 3 

 4 







- 1/3 

 1/3 - 1 2/3 

 1 2/3 - 4 

 4-8 



Calm (glassy) 

 Calm (rippled) 

 Smooth (wavelets) 

 Slight 

 Moderate 



5 

 6 



7 



8-13 

 13-20 

 20 - 30 



Rough 



Very rough 

 "High 



8 

 9 



30 - 45 

 over 45 



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 







