H. 0. Pub. No. 605 



GRAPHICAL CONSTRUCTION OF 

 WAVE REFRACTION DIAGRAMS 



By 



J. W. Johnson, M, P. O'Brien and J. D. Isaacs 



/^ 



JANUARY 1948 



VK 

 603 

 U 618 



UNITED STATES NAVY DEPARTMENT 

 HYDROGRAPHIC OFFICE 



