"MAY 1 3 195$ 

 TR-9 



I 



TECHNICAL REPORT 



ELECTRIC WAVE STAFF 



(HYDROGRAPHIC OFFICE MODEL MARK I) 



SIDNEY H. UPHAM 



Oceanographic Survey Branch 

 Division of Oceanography 



MARCH 1955 



U. S. NAVY HYDROGRAPHIC OFFICE 

 WASHINGTON, D. C. 



