the physical sciences could, be maintained in Washington,, By 

 that time the group had become balanced and matured. 



Aircraft Operations . 



The First Bomber Command , AAF, with headquarters at 90 

 Church Street, New York, supplied long-range bombers for anti- 

 submarine patrol o The commanding officer was Brigadier General 

 Westside To Larson Q Several members of Croup M, including Dr„ 

 Shockley, visited a number of the First Bomber Command airfields 

 in order to learn at first hand concerning the problems of the 

 Army in anti-submarine warfare „ 



It was about this time that it was realized that search 

 radar installed on aircraft would be of considerable importance 

 in locating surfaced submarines by day as well as by nighto 

 This method of search had enlisted the special interest of Dr„ 

 E. L* Bowles, scientific consultant to the Secretary of ','fer. 

 As the result of studies made by the Group, it was indicated 

 that average ranges of first sightings of submarines by radar 

 were definitely larger than average ranges of first visual 

 sightings „ 



Through Dr Bowles the group came in contact with Brigo 

 General H» M„ McClelland, Director of Technical Services of 

 the AAF, whose field of interest included the AAF's radar 

 problems o Group M derived considerable benefit from the ex- 

 perience of his staff, in particular Dr Dale Corson who had 

 worked at Radiation Laboratory 



One of the major developments of the summer of 1942 was 

 the establishment of a Sea Search Attach and Development Unit 

 (SADU) to study the tactical and equipmental problems of anti- 

 submarine operations by aircraft „ This unit, which included 

 Mr„ H„ Ko Kennington, Dr„ Mo Eo Bell, and Mr„ D„ Do Cody, was 

 installed at Langley Field, Virginia, and operated under the 

 direction of Col Wo Co Dolan„ Among its activities, the 

 Unit worked on, and was of assistance in getting into service, 

 search radars, searchlights and bomb-sights for anti-submarine 

 aircraft. 



During the stay of the SADU group at Langley, its members 

 helped maintain liaison between NDRC laboratories and the de- 

 velopment unite They helped to prepare programs for technical 

 tests and then to write up the reports of the tests They had 

 devised a series of exercises which would check the proficiency 



49 



