"The Aquasonde", Teledynamics (Reference 29) 



It is a sing around device operating at about 18 KHZ with a 

 carrier frequency of 1 MHZ. It uses one transducer and one re- 

 flector. It is capable of about 1500 ft depth. 



The instrument Model 7100 A, was tested by the Navy 

 Oceanographic Office, Instrumentation Center, and a Fact-sheet 

 (Reference 32) IFS-002-65 was issued in January 1965. The 

 Fact-sheet quotes: 



Absolute accuracy: ±2.7 m/s 



Relative accuracy: ±2 m/s 



Repeatability: ±0.6 m/s 

 According to "Informal Manuscript Report" No 1-55-66 (unpublished), 

 Naval Oceanographic Office (the basis of Fact-sheet IFS-002-65) , 

 the units that had been submitted for testing performed inconsis- 

 tently and not within the manufacturer's specifications. According 

 to Teledynamics, the instrument has since been improved and is 

 now called: Model 7100B. 



34 



Arthur 2D.ILittlc.Knr. 



