10 



gS^oo' 



50' 



4 



30 



1~T 



'-'N 



AFFECTED AREA 

 (Aerial and vessel survey) 



SEPTEMBER 27, 1957 



DISCOLORED WATER 

 DEAD FISH 

 AREA SURVEYED 



83°00' 



Figure 4. — Survey of red tide occurrence on September 27, 1957. 



44 



