VI. Swell Amount 



Code : 

 I 



Approximate 5 

 Height : 

 (feet) : 



Description 



: Approximate 

 : Length 

 ! (feet) 



3 

 U 

 5 



No swell 



I 6 to 12 



! Short 

 : Moderate Average 

 ; Long 



1 i ; Short or j to 6OO 

 8 1 to 6 : Low swell Average : 



2 s ' : Long : Above 6OO 



J to 300 

 !300 to 600 

 : Above 6OO 



6 



7 

 8 



Greater 

 than 12 



: High 



Short 



Average 



Long 



! to 300 

 t300 to 600 

 J Above 600 



Confused 



VII. Visibility 



Code 





 1 

 2 

 3 

 U 



6 

 7 

 8 

 9 



Dense Fog - — — — — —«-——.»_ — .— — 50 yards 



Thick Fog 200 yards 



Fog UOO yards 



Moderate fog — 1000 yards 



Thin fog or mist — 1 mile 



Visibility poor — .— ——-«-- — — 2 ndles 



Visibility moderate -~— — .— — — 5 miles 



Visibility good 10 miles 



Visibility very good — 30 miles 



Visibility excellent Over 30 miles 



A6 



