Table C-5.--List of chart squares occupied by a research vessel off Washington in Febniary 1968, 

 showing hours in square, seals seen per hour, and number of seals seen and collected^ 



•"The base chart is USCGS no. 5052. The side of each chart square measures 18.52 km. (10 nauti- 

 cal miles); a square covers an area of 343 km.^ (100 square nautical miles). Squares are located 

 by a system of vertical and horizontal numbers. Horizontal numbering begins at the lower right 

 comer of the chart (fig. 13) and vertical numbering at the lower left corner. 



102 



