measurements and playback of the scanner data were solved at the Hydrographlc Office 

 by members of the Submarine Systems Section and the Electronics Branch. The assistance 

 provided by members of the Processing Section In preparing text and related material for 

 publication Is greatly appreciated. Especially helpful in the analysis and presentation 

 of these data were the comments, suggestions, and assistance of Mrs. Mary J . Middleton, 

 whose contribution to this manuscript was Invaluable. 



44 



