Sea State 



Sea state is coded as indicated below: 



Wind Amt. 



Sea Amt. 



Wind Dir. 



and 

 Sea Dir. 



Surface Nitrogen 

 values: 



NH3 



Org. 



In. 



Vi 



CA 



Wind speed is given in knots according to the Beaufort scale 



page 187, H.O. Pub. No. 607, 1955 



Wind direction and sea direction given by points of the compass 



Ammonia, /ig.at./l. 



Total organic nitrogen, ^g.at./l. 



Total inorganic nitrogen,// g.at./l. 



50 yards 



200 yards 



400 yards 



1,000 yards 



1 mile 



2 miles 

 5 miles 



10 miles 

 30 miles 

 30 miles 



Cloud amount is coded as indicated below: 



Code Fraction of sky obscured 



