a. When towed with design values of cable scope 

 and speedy the in situ value of the depth must 

 not be substantially less than 5„000 feet and 

 the in situ value of the cable tension must not 

 be sxibstantially greater than 15,000 pounds. 



b. The components must be structurally adequate; and 



c. The tow must be stable. 



2. Winching equipment must demonstrate satisfactory: 



a. Inhaul and payout of the faired cable without 

 damage to the fairing or cable; and 



b. Englutment and passage of the instrument 

 modules without slippage or damage. 



It was considered that hydromechanical feasibility could 

 be most effectively demonstrated with an engineering model 

 constructed of full-scale elements of the prototype system. 

 Development and test of representative quantities of each 

 major element of the syst«n was accordingly undertaken. 

 Arrangements were made to test the resulting model at sea 

 with representative winching equipments 



The results of this program constitute the subject 

 matter of this report. Since this document is essentially 

 an extension of (2)<, liberal reference has been made to that 

 report for explanation of the underlying philosophy and design 

 approach^ This report presents only component design con- 

 siderations in those few areas where significant changes have 

 been made in philosophy or approach. 



