NAUTICAL CHART TERMS 5 



III 



Proofs 



FILM POSITIVE PROOF 



After the Reproduction Division has completely revised the negatives, including the 

 application of all revisions received subsequent to Drawing (or Compilation) date, the Nautical 

 Chart Division is furnished a stable-base film positive proof. This transparent print is copy- 

 checked against the original Drawing, all corrections indicated thereon, and returned to the 

 Reproduction Division for correcting, plating, and printing. 



BLUE RING COPY 



It shall be the responsibility of the Nautical Chart Division to furnish the Distribution 

 Division with Blue Ring Copies of nautical charts. All areas on these copies in which changes 

 have been made subsequent to the last print shall be outlined in blue pencil. The Distribution 

 Division will duplicate the Blue Ring Copy for the following Divisions of the Bureau and or- 

 ganizations: 



1. Administrative and Technical Services Division — one copy, Alaska only. 



2. Aeronautical Chart Division — one copy, Alaska only. 



3. U.S. Naval Oceanographic Office — one copy of every chart. 



4. Canadian Hydrographic Office — one copy, east coast north of Boston, west coast 



north of Oregon — Washington state line, and Alaska. 



5. British Admiralty — one copy of all New Charts and New Editions. 



IV 

 Chart Printings 



The interval between printings of a chart is determined by the Exhaustion Report, fur- 

 nished by the Distribution Division, or by the amount and type of revisions indicated on the 

 Standard and Aid Proof. 



Printing dates are always the Monday following the Saturday date of the last-applied 

 Notice to Mariners. 



Chart Printings fall under the following classifications : 



NEW CHART 



A New Chart is constructed to satisfy the needs of navigation in a particular area. It is 

 laid out in conformity with a broad scheme to meet future needs in the adjacent areas and 

 is designated by a number not assigned in recent years. The date on which a New Chart is 

 first printed appears in the center of the upper margin of the chart as the first edition date, 

 and remains there for the life of the chart, thus: 



1st Ed., Sept., 1960 



It appears also in the lower left-hand corner, thus: 



1st Ed., Sept. 5/60 



