DIVER RECALL 



At present, diver recall typically is accomplished by some form of explosive 

 device. This system is crude and does not provide the diver with sensory cues 

 that can be utilized effectively. A preliminary study of the issue of diver 

 recall was conducted during TEKTITE II. 



Procedures 



M-80 explosives and a .38 caliber revolver were used (see Figure 3). They were 

 fired both at the surface (Figure 4) and at depths of 10 feet and 20 feet. 

 Calibrated recordings were made of the explosions at distances varying from 

 250-4000 feet. 



Figure 3. The Navy issue .38 cal. revolver used in the retrieval 

 experiments . 



^ wwriimiM ii i ii i iii iii i mi . 



Figure 4. An M-80 exploding on the surface. 



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