Table 11. --Record of surface fish school, bird flock, and aquatic mammal sightings, 

 Charles H. Gilbert cruise 52 (con.) 



1/ X ■ Bird flock; (N) = number of birds in flock. 

 2/ ND ■ Not determined. 



3/ All designated observations were totaled for 4-hour periods. Stated positions are those at 

 end of each period as designated. 



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