NAUTICAL CHART TERMS 



NAUTICAL CHART TERMS 



I 



Standard and Aid Proof 



For every chart published by this Bureau, the Nautical Chart Division maintains a 

 Standard and an Aid Proof on which is noted all charting information received. A short descriD- 

 tion of each follows. 



STANDARD 



A Standard is usually a copy of a New Edition or New Chart on which is indicated all 

 new information, except aids and certain other data, to be applied to the chart before sub- 

 sequent printings. 



AID PROOF 



An Aid Proof is a copy of the latest print on which are indicated all changes in aids to 

 navigation and important corrections that must be applied to the printing plate before the 

 next printing. The majority of these changes are applied by hand to the existing stock of 

 charts before issue to the public. Information regarding changes to aids is derived principally 

 from Notice to Mariners. 



MATTE PRINTS 



Matte Prints are photoprints of the compilations of New or Reconstructed Charts made 

 from the first, unretouched negatives. Two prints are furnished the Nautical Chart Division, 

 one for use as a temporary Standard, the other as a temporary Aid Proof. 



When a New or Reconstructed Chart is printed, all revisions indicated on the temporary 

 Aid Proof are transferred to the new Aid Proof. A check is made to assure that all information 

 on the temporary Standard is indicated on the chart History. The temporary Aid Proof and 

 Standard are then destroyed. 



ADVANCE PRINTS 



At the time of making the above Matte Prints, stable-base film positive prints are made 

 from the unretouched negatives of New Charts and Reconstructed Charts. These positives are 

 forwarded to our District Officer, the Coast Guard, and the Corps of Engineers for advance 

 inspection and return prior to printing the chart. 



