at each whole -degree interval. Three frequency readings 

 are taken on a counter during each step at the even degrees. 

 Ten minutes are allowed at each point for stabilization of 

 the sound-velocity meter heads before readings are taken. 



CONCLUSIONS 



1. The NUWC Calibration Facility has furnished vital 

 support to oceanographic research groups. 



2. The improvements of the mechanical system, and 

 the addition of a pressure-testing unit, have made the 

 facility more versatile. 



3. Assignment of one operator, with a designated 

 alternate, to the facility has resulted in efficient operation 

 and reliable data. 



4. The facility, because of increased demands for 

 reliable temperature calibration, is now in full-time 

 operation. 



RECOMMENDATIONS 



1. utilize the calibration tank for precise temperature 

 calibration and for studies that require constant temperature. 



2. Continue development directed toward improving the 

 mechanical, electrical, and electronic components of the 

 facility. 



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