38 NAUTICAL CHART MANUAL 



In the "History" heading, the compiler shall add only the chart, sheet, and project num- 

 bers. All other items in the heading shall be completed by the Chief, Conventional Chart 

 Branch, and the Chief, Nautical Data Branch. 



Items entered on the "History" should be numbered consecutively, and the information 

 called for under the various headings must be supplied by the compiler. 



Under the heading "Applied," a check mark should be made in the appropriate column to 

 indicate whether the item has been fully or partially applied. As it is important that no item 

 of source material be cleared from the Standard until it is fully applied to the chart, it is re- 

 quired that all partial applications be underscored on the "History" in red. Under no circiun- 

 stances shall any item be considered as fully applied unless it results in a complete applica- 

 tion, either directly or indirectly, of a completed siurvey record. Information applied partially 

 is also indicated on the Standard. 



Under the main heading "Source of Information," there is a sub-heading "File No." The 

 file number usually carries a designation, in addition to the number, which identifies the source 

 material as a hydrographic survey H or topographic sm^vey T of this Biu-eau, or as a blueprint 

 Bp or letter L showing information from other soiffces. In addition to the above items of 

 source material, many publications of other organizations are used to furnish chart information. 

 These publications are entered under "FUe No." with their original designations, such as 

 "A.M.S. Quad Central Park," "G.S. Quad Wmter Haven," "Canadian Chart 803," etc. The 

 important thing to remember is that the reference under File No. should identify the item 

 without question. 



Under sub-heading "Date," the actual date of the survey or determination should be given 

 whenever it can be ascertained. Otherwise, the date of publication is to be used. 



Under sub-heading "Authority," the name of the person, agency, or organization making 

 the survey, determination or report should be entered. 



Under heading "Type of Information," it should be recorded whether the source material 

 involved hydrography, topography, triangulation, aids to navigation, landmarks, cable areas, 

 bridge clearances, names, etc. 



Under heading "Locality," to expedite location of reference area, the compiler shall list a 

 prominent name, approximate geographic position, or general note such as "north quarter of 

 chart," "east portion of chart," etc. 



The entry imder the heading "Information Applied," should consist of a short, definite 

 statement, describing the condition of the som-ce material, how it was used and what infor- 

 mation resulted on the chart. For example, it should be made clear just what information has 

 been charted in every partial application of source material. If the source material is applied 

 before verification and review, or if information is applied indirectly through another chart, 

 it should be so stated. If contours only, or shoreline only, or drainage or cultivation, or a com- 

 bination of any of these were used, mention should be made of this. If no correction to the 

 chart is required from the source material, this fact should be stated. This column may also 

 be used for any pertinent and useful remarks. 



Keference to triangulation sources must be as complete as possible. For example: "Geo- 

 graphic positions, Calif. Ill, page 38." 



