ACKNOWLEDGMENTS 



The Authors are deeply indebted to: LCDR. E. W. Sapp 

 for his encouragement and enthusiastic support of this 

 effort; Mr. Ralph Lane for the basic design of the instru- 

 ment circuitry; Mr. H, M. Fitzpatrick and Mr. D. C. Pauli for 

 their critical review and many contributions; Mr, P. D. Fisher 

 for his contribution to the design of the towed depressor; and 

 Dr. Edgar Bowles and Mrs. Betty Singer for editing and pre- 

 paring the manuscript for publication. 



