AVERAGE DIVE DURATION HISTOGRAM 

 PTT 843 - 1989 



40 



30 





20 - 



- 







20 40 60 80 100 120 140 



AVERAGE DIVE DURATION (SEC)/4 HR PERIOD 



Figure 53. Frequency histogram of average dive duration during 4-hour summaries for PTT 

 #843 tagged in 1989. 



85 



