36 NAUTICAL CHART MANUAL 



Clearances, other than those furnished by the Corps of Engineers, shall not be charted. 



Overhead cable crossings located from other sources such as C&GS surveys, aerial photog- 

 raphy, etc., shall be charted and labeled OVEEHEAD POWER CABLE or OVEEHEAD 

 CABLE, as the case may be. The Nautical Data Branch should be requested to obtain the 

 authorized permit clearance of such cables. 



Clearances shall not be shown on waterways which are not represented by depth curves, 

 soundings or depth legend. Symbol and designation shall be charted. 



Exception: Such clearances may be included on small-craft charts. 



VIII 



Records 



DESCRIPTIVE EEPOET NOTE 



When an original topographic or hydrographic survey is apphed to a chart, a notation 

 shall be entered in the Eeview Section of the Descriptive Eeport of the survey on Form 

 C&GS-8352, "Eecord of Application to Charts." If Form 8352 is not in the Descriptive 

 Eeport, the cartographer shall insert one next to the back cover. 



HISTOEY OF CAETOGEAPHIC WOEK 



A record, commonly known as a "History" (Form C&GS-8322) must be submitted for 

 every chart compilation, whether it results in a new chart, a reconstructed chart or a correction. 

 The "History" must represent a complete and detailed record of all available information used 

 or consulted in the compilation. The information used for the compilation may come from 

 various types of surveys and records, such as hydrographic sheets and accompanying descrip- 

 tive reports, topographic sheets and descriptive reports, blueprints, letters, field examinations 

 and reports, U.S. Engineers reports, Coast Pilot publications, congressional documents, charts 

 of foreign coimtries, Name Standards of this Bureau, triangulation records, and many other 

 sources too numerous to mention. It is the compiler's duty to obtain, whenever possible, any 

 available information, in addition to that on record in the Division, which is pertinent to the 

 job in hand. A sample of this record is shown on the following page. 



