10 



50' - 



40' 



30' 



AFFECTED AREA 

 (Aerial and vessel surveys) 



OCTOBER 4,1957 



= DISCOLORED WATER 

 \^'^^ ' DEAD FISH 

 = AREA SURVEYED 



ea^OO' 50' 40' 30' 



Figure 9. — Survey of red tide occurrence on October 4, 1957. 



49 



