should be capable of being attuned to and broadcast back on a pre- 

 selected frequency band. 



(4) Transceiver unit should contain its own power supply 

 and this should have an assured 6-lZ month life unattended, in this 

 intermittent type of interrogation. 



(5) Transceiver unit to shut down automatically when inter- 

 rogation has ceased. 



(6) Transceiver to perform reliably at ranges varying from 

 10-50 miles. 



b. Shi pboard/Airborne Transceiver Unit : 



(1) The instrument to be designed for operation from either 

 an oceanographic research/ survey ship or from an aircraft (scien- 

 tific or military). 



(Z) For reasons of flexibility and economy, existing radar/ 

 radio systemis as now installed in research/survey ships and 

 scientific/military aircraft should be utilized, if feasible, for the 

 shipboard/airborne transceiver unit. 



Potential Us ers and Estimated Number of Units Which They May 

 Require : 



a. U. S. Navy (basic research, applied research, and hydro- 

 graphic-oceanographic survey ships) - 20 to ZOO. 



b. U. S. Coast and Geodetic Survey - 10 to ZO . 



c. Certain activities within scientific community - 10 to ZO. 



d. U. S. Coast Guard - 10 to ZO . 



e. Bureau of Commercial Fisheries - 10 to 100. 



Total: 60 to 360- 



Recommendation Where Instrument Should Be Researched and 

 Developed: 



U. S. Industry. 

 Relative Importance to U. S. National Oceanographic Program: 

 Individual instrument/equipment priority 10. 



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