Total: 70 to 3b0 . 



Recommendation Where Instrument Should Be Researched and 



Developed: 



U. S. Industry • 

 Relative Imiportance to U. S. National Oceanogr aphic Program: 

 Individual instrument priority 9. 



I.J. SURFACE NAVIGATION AND BUOY LOCATION 



TRANSPONDER 



Primiary Use: 



To be utilized on oceanographic survey ships during miscellan- 

 eous oceanogr aphic operations for three purposes: (1) To permit 

 seaward extension of existing shore navigation control stations in 

 certain areas designated for specific survey assignments (hydro- 

 graphic-oceanographic) , (Z) To aid in the location and "homing in" 

 on deep-sea anchored buoys and/or other devices, and (3) To 

 provide a system for establishing reference grids in extended ocean 

 areas lacking electronic navigational aids for conducting special 

 research and/or survey operations. 



Requirements and Specifications : 



a. Buoy-Mounted Transceiver Unit: 



(1) Transceiver unit to be mountable on various size buoys 

 and at a sufficient height above the surface of the water so as to 

 permit maximum range performance. 



(2) To consist of a low-powered transceiver unit which would 

 be activated by the servicing ship's interrogation pulse and then 

 transmit a signal back automatically on the same frequency. The 

 transceiver should be tr ansitorized, compact, light-weight, rugged, 

 and provide for reliable unattended operation. 



(3) Transceiver should be designed so that it can be activ- 

 ated, if possible, by existing survey/research surface ship's radar/ 

 radio systems and also by existing aircraft systems which might be 

 utilized in oceanographic investigations and surveys. In brief, it 



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