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Prototype test vehicle 



Variable-speed hovering motor 

 mounted in the fairwater permits 

 vertical maneuvering; horizontal 

 movement controlled by variable- 

 speed stern thrusters and a 

 hydraulically-operated rudder 



Recently used to inspect AT&T 

 cables and plant buoys in 

 Atlantic; also used to place a 

 parabolic reflector to focus 

 sound between deep scattering 

 layer and array transducer for 

 U. S. Navy Underwater Sound 

 Laboratory 



Sub has ultrasonic voice 

 communication system with 

 maximum range of more than 

 1 mile; this is used to track sub 

 and permits recording both ends 

 of all transmissions; Submaray 

 used in the filming of McHale's 

 Navy and other television 

 programs. 



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