photographs was performed to determine the pattern of colonization within the site and at the 

 reference areas. DAMOS Contribution #60 (SAIC 1989) presented a detailed description of 

 REMOTS® photograph acquisition, analysis, and interpretative rationale. 



In the 1990 REMOTS® survey, dredged material was detected up to 800 m west, 

 500 m south, 400 m east, and 500 m north of the disposal buoy (Germano, Parker, and 

 Charles 1994). In the 1992 survey, REMOTS® stations extended beyond the previous survey 

 and were chosen based on rapid analysis of the bathymetric data. This method of REMOTS® 

 station selection allows efficient positioning of stations around the acoustically detected 

 mound and on the mound flanks to clearly define the distribution of dredged material. 

 REMOTS® stations were spaced 100 m to 300 m apart to adequately delineate the transition 

 of dredged material on the mound flanks to ambient sediments (Figure 2-1). REMOTS® 

 stations BOl through BOS (Figure 2-1) were selected to define more clearly the western 

 boundary of the dredged m.aterial. The 13 REMOTS® stations established at each of the 

 three reference areas (FG-23 REF, SE-REF, and 18-17 REF) allowed comparisons between 

 ambient and on-site conditions. The reference area stations are in a cross-shaped pattern and 

 spaced 100 m apart. Table 2-1 summarizes reference area locations, depths, and distances 

 from the "MDA" buoy. 



Table 2-1 



MBDS Reference Areas 





Location 



Distance from "MDA" Buoy 



Depth 



FG-23 



42° 22.700' N latitude 

 70° 34.600' W longitude 



1348 m southwest 



85 m 



SE-REF 



42° 20.000' N latitude 

 70° 28.000' W longitude 



3942 m southeast 



90 m 



18-17 



42° 24.686' N latitude 

 70° 32.814' W longitude 



723 m southeast 



80 m 



Monitoring Cruise at the Massachusetts Bay Disposal Site, March 31 - April 4, 1992 



