60 



3 

 O 

 t 

 2 30 



O 

 3 24 



BOTTOM 



CALIBRATED TEST STAKE 

 SITE 3 

 5 MONTHS 



FOULING PANELS 

 SITE 4 

 4 MONTHS 6 MONTHS 



l1'&,MlLU»JJ!' l .i. l iJsr 



- 



■■< -: ■•,--.,:.■:•'< :•■:; 



|525/FT 2 | 



NUMBER/FT 2 

 100 200 300 400 



FIGURE 16 BARNACLE FOULING INTENSITY VARIATION (DIFFERENCES 

 IN TEST OBJECT TYPE AND HEIGHT ABOVE THE BOTTOM 

 FOR SITES 3 AND 4). 



19 



