16 NAUTICAL CHART MANUAL 



Corrections to existing charts shall be made on Drawings as foUows: 



1 . Additions and revisions for the black printing plate shall be indicated in red ink. 



2. Deletions in areas not otherwise changed shall be crossed out in blue ink. Dele- 

 tions in close proximity to a correction should be scraped out. 



3. Revisions to a color plate shall be indicated in green ink. Where a magenta print 

 on acetate accompanies a Drawing, all corrections to the magenta printing plate shall be 

 indicated in green ink on the magenta print. 



4. For accentuation to the engravers, the verifier should encircle all corrections 

 specified in items 1-3, using a vermilion red pencil. The verifier should also draw red 

 leading lines from the corrections to the margin of the Drawing or magenta print. 



5. The compiler shall revise aU navigational aids as indicated on the Aid Proof. 



6. The low water line shall be shown by a dotted curve. Where necessary to clarify 

 for reproduction, the compiler shall label low water areas "G" (for green) and land areas 

 "B" (for buff). 



7. All closed depth curves are to be indicated, at least partially, in the proper symbol 

 to indicate clearly to the engraver which symbol is to be charted. A solid line connection 

 between two portions of a chartered curve may be used if it is self-evident which symbol 

 is represented. Other depth curves shall be drawn in fine, solid lines. 



8. Corrections to the border format shall be made by the Aids to Navigation Section. 



9. Corrections to topography made in the Division of Photogrammetry shaU be 

 examined by the compiler and revised as necessary to conform with other changes. 



10. A printed copy of the chart must be consulted to avoid making corrections that 

 would conflict with color information. When noted on the Standards, special care must 

 be taken to avoid color conflicts on several charts which are used as bases for overprinting 

 special Oceanographic OfBce anchorage charts. 



11. A comparison and agreement must also be made with all overlapping charts of 

 the same and larger scales. 



SUPPLEMENTAL CORRECTIONS 



Corrections to Drawings or Compilations on which reproduction work has been started 

 are to be encircled boldly in green pencil. A leading line is to be drawn in green therefrom to 

 the following marginal note in green: "New work by Date " 



DISPOSITION NOTATIONS 



Explanatory notations as to the disposition made of the material available-for the correction 

 of a chart must be lettered by the cartographer on Blueprints, Letters, etc. For example, 

 "Not used; see Letter 377 (1962)". When a Blueprint, Letter, or other similar authority is 

 applied to a chart, the compiler must write on the authority the words "Applied to Chart 

 No. " with the date and his initials. 



