Table C-2. — List of chart squares occupied by research vessels off 

 Washington in January 1967, showing hours in square, seals seen 

 per hour, and number of seals seen and collected 1 — Continued 



\J The base chart is U. S. C. G. S. no. 5002. A chart 

 square forms an area of 343 square kilometers (100 square 

 nautical miles). The side of each measures 18. 52 kilometers 

 (10 nautical miles). Squares are located by a system of vertical 

 and horizontal numbers. Horizontal numbering begins at the 

 lower right corner of each chart and vertical numbering at the 

 lower left corner. 



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