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19.1A°/. active ingredient bis (tributyl t in) adipate. 



B. Data Retrieval 



At the FRF installation site, the cable interfaces with 

 Facility equipment at the seaward end of the pier. The power supply 

 board is located inside a trailer at the seaward end and the 

 transducer output leads are hard-wired down the length of the pier 

 and recorded on a NOVA computer system located inside the facility's 

 main building on shore. The computer digitally records the 

 transducer signals at 1/4 second sampling for a 17 minute period 

 every six hours. 



C. Some Considerations of the Hardware Design 



1. Fuselage Isolation Diaphragms 



The absolute pressure measurement and one side of each of the 

 differential pressures are all to be taken at the instrument center. 

 Five individual diaphragms in the fuselage are employed for this 

 task. Since not all of the diaphragms can occupy the center of the 

 instrument in one plane, there is a small error inherent when saying 

 that the differential measurements are exactly adjacent and share an 

 endpoint with the absolute measurement. The midpoint of the fuselage 

 isolation diaphragms are each about two inches (7.1 cm) from the 



