cylinders to collect bottom organisms and steel tubular stakes for 

 determination of vertical stratification. Figure 2 shows the basic 

 fouling panel rack and the curved steel panels. The panels measuring 

 15 1/4x8x1/8 inches were used in all phases of the problem. Panel 

 introduction and removal schedules are shown in Figures 3, 4, 5, 6, 

 and 7. 



The Harbor Defense Unit, Norfolk, Virginia constructed and 

 positioned the racks, provided small boat services, and assigned 

 divers to the project. The sites were occupied at approximately the 

 same time each month, near midmonth, in order to insure the planned 

 continuity of fouling panel series and collateral environmental data. 

 Each 1-month period is referred to as April-May, May-June, etc. 

 Of course, it was not possible to adhere to a firm schedule throughout 

 the study because of inclement weather, equipment failures, and 

 boat nonavailability. 



EXTRA WEIGHT MAY 

 BE ADDED HERE 



FOULING PANELS 



FIGURE 2 FOULING PANELS AND BASIC RACK. 



