FOREWORD 



This narrative report of the activities of Division 6 

 of the National Defense Research Committee will recall 

 many memories to those who spent their World War II years 

 in the cooperative effort that constituted the Division's 

 contribution to the defense of our nation. That this con- 

 tribution was effective is due in major part to the deep 

 and sympathetic understanding of the problems of nature 

 and men which identified the wise leadership of the Divi- 

 sion's Chief, John Tate-, In carrying out his important 

 undertaking, Dr, Tate was fortunate in having as his able 

 deputy, Edwin Colpitts, who returned from retirement to 

 carry much of the burden of organizing, guiding, and ad- 

 ministering the details of a fifty million dollar program 

 employing many hundreds of scientists of diverse interests 

 and temperaments and extending over the entire United 

 States and all theaters of Naval combato Both Dr Tate 

 and Dr. Colpitts earned the gratitude of the Nation and 

 the personal affection and respect of all who were 

 privileged to be their associates. 



In the years succeeding the disbanding of Division 6 

 in 1945, an effort has been made to keep alive the close 

 contact and mutual understanding established during the 

 past between the Navy and civilian scientists interested 

 in the many difficult technical and operational problems 

 characterizing modern antisubmarine warfare. And although 

 long-delayed, perhaps the appearance of this report of a 

 fruitful partnership is timely in this troubled period 

 to remind us of the accomplishments possible in a spirit 

 of common purpose, 



GAYLORD P. HARNWELL 



The Committee on Undersea Warfare 

 (Member , Division 6, NDRC) 



