TABLE 6. SWELL AMOUNT 



Code 



Approximate 

 Height 

 (feet) 



Description 



Approximate 

 Length 

 (feet) 











No swell 







1 

 2 



) to 6 



Low swell 



Short or 

 Average 



to 600 



Long 



Above 600 



3 



4 

 5 



6 to 12 



Moderate 



Short 



to 300 



Average 



300 to 600 



Long 



Above 600 



6 

 7 

 8 



Greater 

 than 12 



High 



Short 



to 300 



Average 



300 to 600 



Long 



Above 600 



9 







Confused 







TABLE 7. VISIBILITY 



Code 



Dense fog 



1 Thick fog — 



2 Fog — - 



3 Moderate fog -- 



4 Thin fog or mist 



5 Visib 



6 VIsIb 



7 VIsIb 



8 Visib 



9 Visib 



ty poor 



ty moderate 



ty good 



ty very good 



ty excellent Over 



- 50 yards 

 200 yards 

 400 yards 



1000 yards 



- 1 mile 

 -- 2 miles 

 -- 5 miles 



- 10 mi les 

 30 miles 

 30 miles 



TABLE 8. WATER COLOR 



Code 

 ,% yellow) Description 



00 -— Deep blue 

 10 — Blue 



20 Greenish-blue (or green blue) 



30 Bluish-green (or blue green) 



40 Green 



50 Light Green 



60 Yellowish-green 



70 Yellow Green 



80 Green Yellow 



90 Greenish-yellow 



99 -— Yellow 



90 



