of soon being available , it became apparent that Division 6 

 must give special assistance to the Navy in connection with 

 the installation, maintenance and operation of anti-submarine 

 devices o The answer was the establishment of the Field Engi- 

 neering Group whose activities are discussed in Chapter XIV» 



Another organizational development which took place 

 comparatively late in the life of Division 6 was the estab- 

 lishment of the Pearl Harbor Division,, The request for an 

 NDRC evaluation and appraisal group at Pearl Harbor was orig- 

 inated by the Commander Submarine Force q Pacific Fleet in a 

 dispatch of 12 July 1944 „ The Pearl Harbor Division was 

 established in August and became a functioning organization 

 as local representative of the NDRC New London Laboratory» 



The Pearl Harbor Division furnished valuable assistance 

 to representatives of other NDRC contractors „ It was kept 

 constantly up to date by the New London Laboratory,, Thus 

 they were able to bring the results of the latest research 

 to bear in such fields of activity as; shipboard installa- 

 tion of equipments on which development was substantially 

 complete ; evaluation of equipment,, methods and tactical pro- 

 cedures; sound measurements and investigations of improved 

 sound measuring facilities; miscellaneous apparatus and 

 methods investigations! selection and trainings and engineer- 

 ing assistance to the selection and training group,, 



Originally designated Section C-4 of NDRC, the Underwater 

 Sound Group at the time of NDRC r s reorganization on 9 December 

 1942, became officially Division 6 with Dr „ Tate as Division 

 Chiefo All research and development work of Division 6 was 

 concentrated in one section, Section 6 l s of which Dr„ Colpitts 

 wa s Chi e f o 



This chapter outlines some of the high-spots during the 

 early months of organization of the research work on anti- 

 submarine warfare and underwater sound „ It does not pretend 

 to be a complete history of the organization,, but it is hoped 

 that the following chapters will tell the story of the Divi- 

 sion 6»s growth and accomplishments „ 



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