U. S., DEPARTMENT OF COMMERCE 

 Frederick H. Mueller, Secretary 



COAST AND GEODETIC SURVEY 

 H. Arnold Karo, Director 



HYDROGRAPHIC MANUAL 



Publication 20-2 



By Captain Karl B. Jeffers 

 Coast and Geodetic Survey 



UNITED STATES GOVERNMENT PRINTING OFFICE. WASHINGTON 



1960 



For sale by the Superintendent of Documents. U. S. Government Printing Office 



Washington 25. D. C.-Price $2 



