Table 10. --Record of surface fish school, bird flock, and aquatic mammal sightings. 

 Charles H. Gilbert cruise 51 (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, 

 end of each period as designated. 



Stated positons are those at 



36 



