USS Marysvilk (PCER 857) 



A former escort craft built in 1944 and, in 1951, assigned to 

 support research and development projects at West Coast Navy 

 laboratories. Marysvilte was inactivated in 1 970. 



Length: 185' Displacement: 900 tons 



USS Rockville (PCER 85 1) 



A former escort craft built in 1944 by Pullman Standard Car 

 Manufacturing Company of Chicago. In 1953 she was assigned to 

 support research and development projects at Navy laboratories, 

 principally the Naval Research Laboratory. Rockville partic- 



ipated as part of the Task Group which conducted the first year 

 search operations for the nuclear submarine Thresher. Rockville 

 was disposed of in 1969. 

 Length: 185' Displacement: 900 tons 



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