TABLE VI. SWELL AMOUNT 



Code 



Approximate 

 Height 

 (feet) 



Description 



Approximate 

 Length 

 (feet) 











No 



swell 







1 

 2 



1 to 6 



Low swell 



Short 



Average 

 Long 



to 600 

 Above 600 



3 



k 

 5 



6 to 12 



Moderate 



Short 



Average 



Long 



to 300 



300 to 600 



Above 600 



6 

 7 

 8 



Greater 

 than 12 



High 



Short 

 Average 



Long 



to 300 



300 to 600 



Above 600 



9 







Confused 







TABLE VII. VISIBILITY 



Code 



Dense Fog ———-■——— 



1 Thick Fog 



2 Fog — — — ____—> 



3 Moderate Fog — - — — — — — — 



k Thin Fog or Mist 



5 Visibility poor —————. 



6 Visibility moderate 



7 Visibility good 



8 Visibility very good — 



9 Visibility excellent 



50 yards 



200 yards 



IfOO yards 



1000 yards 



1 mile 



2 miles 

 5 miles 



10 miles 



30 miles 



Over 30 miles 



6k 



