DISCRETE DIVE DURATION HISTOGRAM 

 PTT 843 - 1989 



120 240 360 480 600 720 



DIVE DURATION (SECONDS) 



840 



Figure 52. Frequency distribution of discrete dive durations (x = 73.5 ± 18 s) for PTT 

 #843 (1989). Intertransmission dives (ITDs) are, by definition, less than 40 seconds and 

 were included in the analysis (see Appendix B). 



84 



