TABLE OF CONTENTS 



Page 

 ACKNOWLEDGMENTS o .. ..o 0..0 oo. o o .,.,....„. ,.o o . o . 1 



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 ■'-'^•^■'^'^•'-'U^^ •'•'-'J^ « a<>»<>o<>oooooaooo(>oaaa«**aaa*a*o<>«aasao**<*«e 3 



REQUIREMENTS FOR DEEP-TOWED INSTRUMENTATION SYSTEM. ..... 7 



SYSTEM DESCRIPTION o.. ...... o.. ,.o ....................... 11 



^XDiCM DCaOXGNo o...aa..oeaooaooao.oae.*.o.ooo.........sB. 14 



SYSTEM CONSIDERATIONS, o.. .............. 15 



COMPONENT SELECTION AND DESIGN. .16 



Selection of Cable Type. 16 



Selection of Cable Size and Downforce. .,.,... .22 



Design of the Towed Body. , , . 25 



Effect of Variation in Speed and Cable Length. 31 



Cable Fairing. 37 



Design of the Instrument Housings 41 



Shipboard Hand ling Equipment 44 



Instrumentation. „ .....53 



DISCUSSION* '•••••oaoo..ooooo...............,.,,,.,,pg,,,35 



CONCLUSIONS AND RECOMMENDATIONS 60 



APPENDIX I: PRELIMINARY DESIGN OF A DEPRESSOR FOR THE 



TOWED, VERTICAL- INSTRUMENTATION ARRAY. .... .62 



INTRODUCTION. 63 



HYDRODYNAMIC DESIGN. 65 



