60 



FREQUENCY HISTOGRAM FOR DEPTH OF DIVE 



(DIVES > 120 SECONDS) 



PTT 843 - 1989 



50 



40 



o 



w 



6h 



30 



20 



10 - 







34-68 68-10 102-136 136-170 170-204 204-238 



DEPTH OF DIVE (METERS) 



Figure 26. Frequency histogram of discrete dive depths ( + /- 17 meters) for PTT #843 

 (1989). 



51 



