Table C-10. — List of chart squares occupied by a research vessel off Alaska (Area IV) in July 

 1968, showing hours in square, seals seen per hour, and number of seals seen and collected'^' 



■"■The base chart is USCGS no. 8802. The side of each chart square measures 18.52 km. (10 nauti- 

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

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

 corner of the chart (fig. 17) and vertical numbering at the lower left comer. 



106 



