ALL PTT's 



20 



K 15 







Q 

 W 

 M 



a, 

 en 



1000 







en 



X. 



Q 

 W 



a. 







o 0-5 KM/HR 

 V 5-10 KM/HR 

 • > 10 KM/HR 



^ 0° n 



D 



CD 



50 100 150 200 250 



AVERAGE DIVE DURATION (SECONDS) 



50 100 150 200 250 



AVERAGE DIVE DURATION (SECONDS) 



200 



400 600 



NUMBER OF DIVES 



800 



300 



300 



000 



Figure 83. The relationship of: A) speed to average dive duration; B) number of dives 

 versus average dive duration; and, C) speed versus number of dives for all PTTs. 



124 



