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

 Charles H. Gilbert cruise 52 



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

 2/ ND = Not determined. 



2' All designated observations were totaled for 4-hour periods. 

 end of each period as designated. 



Stated positions are those at 



37 



