FOREWORD 



This report is the fovirth in a series concerned with 

 the development of a ship-towed instrument system capable 

 of measuring selected oceanographic parameters in the vert- 

 ical profile. This system differs from most other "profile" 

 type developments in that measurements may be taken while 

 underway^ permitting determination of the "space-wise" 

 variation of oceanic characteristics. 



Reports previously issued under this contract are: 



Vftn. M. Ellsworth: " General Design Criteria for Cable- 

 Towed Body Systems Using Faired and Unf aired 

 Cable ; Systems Engineering Division, Pneiimo- 

 Dynamics Corporation, Technical Report 6634-1^ 

 October 1960. 



Whi. M. Ellsworth and S. M. Gay^ Jr.: Preliminary 



Design of a Cable-Towed Oceanographic Instru- 

 mentation System ? Systems Engineering Division ^ 

 PneumoDynamics Corporation <, Technical Report 

 6634-2^ February 1961. 



L. W. Sonde: Investigation of a Tractor-Type Winching 

 Machine for Handling Faired Cables and In-Line 

 Instrument Modules ; Systems Engineering Division^ 

 PneumoDynamics Corporation^ Technical Report 

 6634-3, July 1962. 



In this report, the development of the submerged 

 towed elements of the system is discussed. A preliminary 

 investigation of a winching device is described. 



