etc. , are resolved by a high degree of quality control. Early and 

 detailed attention to the basic material and dimensional tolerances 

 during fabrication and assembly are essential if improved reliability 

 is to be achieved. Development efforts should be continued to 

 provide a reliable electric drive system including high pin density 

 electrical penetrators, light weight cabling, void and flaw free en- 

 capsulation and cable jackets and fluid for pressure compensated 

 switching circuits. 



In variable ballast and trim systems there is a need for a high 

 head salt water pump of small size and low power requirem.ents. 



Small, light weight hydraulic systems capable of reliable op- 

 erations at 20, 000' are not available today. Hydraulic power is 

 frequently more reliable and more easily controlled than electric 

 power and therefore is a popular choice for more subsystems. 

 For conventional systems, greater reliability at lower size and 

 weight must be investigated. In addition, a breakthrough is needed 

 to develop ways for using seawater itself as a hydraulic fluid. 



Improved high capacity and lighter weight constant -tension 

 winches are required for deep ocean towing of sensors and for the 

 safe launching and recovery of instrumentation and vehicles. 



Whatever the mission requirements may be, the auxiliary 

 systems must be optimized in terms of reliability, simplicity, 

 maintainability, weight and volume. Development has not re- 

 ceived the attention given materials and power sources, although 

 of equal importance. 



Oceonics 



Sensors, navigation, and command and control, termed 

 "oceonics", are also areas requiring major development. Much 

 of our present effort in this area should be devoted to improving 

 performance and reliability of equipment and reducing bulk and 

 weight of existing equipment. 



A need exists for equipments capable of detecting, locating 

 and inspecting man-made objects or installations on the ocean 

 floor. At-sea search operations depend primarily on the search 

 rate and the vehicle's navigational accuracy. Our present search 

 sensors, whether towed or mounted on submersibles, provide a 



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