confirm our conclusions. ı 
In the paper by Kattawar and Humphreys (1976) the sensitive- 
ness of the normalized DR values to chlorophyll concentration in 
the water for wavelengths of 400, 440, 520 and 640 nm is discussed. 
We have made similar estimations too. In outlines our resuits 
agree with those of the above given authors. However, the 
Kattawar^s results show practically no difference between the sen- 
sitiveness of DR to cc for 400 and 440 nm, but by our data the 
wavelength 440 nm must be preferred. 
References 
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color measurements by the research vessel "Ayu-Dag" in August 
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inhomogeneities from aboard a helicopter.The Insvestigation and 
Modelling of Processes in the Baltic Sea, Part II, Tallinn 
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in an atmosphere - ocean environment: a theoretical study. 
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4. 
  
   
   
    
   
    
   
     
   
     
    
   
  
    
    
      
   
   
  
   
  
  
   
      
    
    
   
     
      
     
  
  
   
  
    
    
     
    
    
     
    
   
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