Sezack 



The submersible is composed of three interconnecting seven foot 

 pressure spheres which, with the external effectors, are encased in 

 a free flooding lightweight hull. A transfer skirt will be affixed 

 to the center sphere to facilitate mating to a submarine escape hatch. 

 The center and rear spheres, reserved for the transfer of personnel, 

 will be capable of accommodating up to twenty-four evacuees at one 

 time. The forward sphere will house the pilot and co-pilot, their 

 life support systems, an emergency battery, power converters, in- 

 verters and heat exchangers in addition to the internal sensors, 

 controls, displays and sensor system electronics. 



DSRV Sensor, Control and Display Systems 



The difficult environment in which the submersible must operate, 

 near the ocean bottom and in the proximity of a disabled submarine 

 hull, as well as the requirement to mate to the disabled submarine 

 escape hatch in the presence of ocean currents have imposed the need 

 for an extensive number of sensors. The sensor, control and display 

 subsystems, which are being integrated by the Naval Applied Science 

 Laboratory, include the sonar, communication, optics, ship control, 

 central processor and special device units of the submersible. Con- 

 sideration has been given to the use of the submersible for secondary 

 oceanographic research missions and its initial design has allowed 

 for the subsequent addition of secondary mission sensors. 



The optical suit consisting of camera, light and viewport opti- 

 cal subsystems will be used for direct short range observations as 

 well as for recording purposes. One internal and five external TV 

 cameras, some of which will be mounted on retractable pan or on 

 pan and tilt mechanisms, will permit short range viewing, during in- 

 spection and final mating operations. An internal TV camera, mounted 

 on the mating hatch viewport and two external TV cameras mounted on 

 pan and tilt mechanisms, fore and aft of the mating skirt, will pro- 

 vide the operators with redundant optical systems during inspection 

 and final mating operations. A TV camera mounted in the nose of the 

 submersible will permit forward observation and two upper TV cameras 

 mounted on pan mechanisms will permit surfaced observations as well 

 as inspection in the event of underwater fouling. Still and movie 

 cameras mounted on the pan and tilt mechanisms will provide a means 

 of recording as well as a method of on-site evaluation of problems 

 caused by debris obstruction. Internal viewport optics will facili- 

 tate direct observation for extended periods without the limitation 

 caused by fatigue resulting from cramped position, direct eyeball 

 viewing through the viewports . 



The communication suit will include a long range underwater tele- 

 phone, a voice and instrumentation tape recorder, a radio for surface 

 communication and positioning, a telephone intra and intercom system 

 and directional listening hydrophones. The hydrophones, which are 

 merely an extension of the pilots' ears to the outer hull, will enable 

 the operator to home in on a signal source. 



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