APPENDIX II 



SEA TRIALS 



INTRODUCTION 



A model of the towed system was tested at sea aboard the 

 U.S.S. YAMACRAW (ARC-5) during the period 13 to 17 April 1962. 

 The testa were conducted to establish the hydromechanical 

 feasibility of the system. For this purpose, it was considered 

 necessary to test only selected full-scale elements of the 

 system, and to provide only enough instrumentation to define 

 the operating characteristics; a single pressure sensor 

 located at the depressor seemed sufficient, provided measvire- 

 ments of cable tension and tow-cable angle were taken simul- 

 taneously. 



DESCRIPTION OF EQUIPMENT 



General 



The towed systen consisted of 1,200 feet of cable (the 

 lower 685 feet of which was faired) , a prototype depressor ;, 

 and one test module. The handling and storage equijwjent con- 

 sisted of an endless-track-type winch^ an existing storage 

 reeli, an existing stern sheave, and miscellaneous fairleads 

 and rollers peculiar to the specific installation. A 

 tensiometer;, depth indicator, and simulated instrument module 

 were also utilized. 



II. 2 



