SYNOPSIS OF THE INVESTIGATION 



The elements of the towed system were developed along 

 the lines indicated in (2) ^ and subjected to tests at sea. 

 On the basis of the tests^ minor modifications and improve- 

 ments were effGcted^ and the design of the towed elements 

 finalized to the extent possible at this time; the resulting 

 design is presented in the following section. The details 

 of component development are discussed in Appendix I^ and 

 the description of the sea trial is given in Appendix II. 



During the development ^ a major change in the length 

 of faired cable was found necessary to attain the desired 

 performance; this is discussed in Appendix III. 



The feasibility of using an endless-track-type winching 

 machine for handling the faired cable and instrument modules 

 was investigated. Comprehensive tests ^ to determine the 

 effect of cable fairing on the machine's tractive effort, 

 were conducted with a commercially available unitT a sea 

 test was carried out with a similar, but larger unit. The 

 results of the first tests are reported in (3); the sea test 

 is described in Appendix II of this reporto 



A very limited investigation was made of the problems 

 of passing the towed system over the stern of a vessel and 

 the final storage of the syston aboard ship. The results of 

 this investigation and a discussion of the winching problero 

 are given in the section headed "Results of Handling System 

 Investigation. " 



