U.S. DEPARTMENT OF COMMERCE 

 Luther H. Hodges, Secretary 



COAST AND GEODETIC SURVEY 

 H. Arnold Karo, Director 



April 1, 1963 



CHANGE NO. 1 



to 



C&GS PUBLICATION 20-2 



HYDROGRAPHIC MANUAL 



Third (1960) Edition 



Change No. 1 (April 1, 1963) supersedes and /or replaces Provisional Changes 1 through 

 8 of 3/20/61 to 1/10/63. Revised, reprinted, or new pages in this packet are listed 

 below. 



Ill— Change 1 

 IV— Blank 



IVa— Change 1 

 IVb— Blank 



IVc— Change 1 

 IVd— Blank 



V — Change 1 

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VII— Change 1 

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17— Change 1 

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27 — Change 1 

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65 — Reprint 

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!)1 — Reprint 

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103— Change 1 

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127 — Reprint 

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143— Change 1 

 144 — Reprint 



UNITED STATES GOVERNMENT PRINTING OFFICE : 1963 



For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington 25, D.C. - Price 35 cents 



(Change 1) III 



