Sezack 



Timing separation - A sonar timing coordinator has been developed 

 that will sequence the operation of the altitude, depth, vertical 

 obstacle avoidance and transponder interrogation sonars so as not 

 to interfere with each other. 



Frequency separation - Separate frequency bands have been allocated 

 to the sonars so that interference between the units that must be on 

 simultaneously will be minimized. 



The controls and displays for the sensors, power supplies, 

 vehicle effectors, manipulator and life support equipment have been 

 integrated in a control panel located in front of the operators. 

 Multi purpose sonar and TV displays have been incorporated in the 

 panel for simultaneous viewing of selected sensors and for reasons 

 of redundancy. In addition the central processor has been pro- 

 grammed to automate many of the control and status functions to 

 relieve the operators of the monitoring load. 



With the addition of special devices such as radiation detectors 

 and pressure gages, the number of major Sensor/Ship Control subsystems 

 will approach forty. To meet mission reliability requirements func- 

 tional redundancy has been provided in critical areas such as ob- 

 stacle avoidance, attitude reference, navigation, ship control and 

 depth indication. With equipment redundancy, a Sensor/Ship Control 

 subsystem reliability of 0.96 for a rescue mission sequence is con- 

 sidered a reasonable goal. 



The developmental DSRV is scheduled for sea tests in mid 1968. 

 Shortly thereafter the Navy will, for the first time, have a rescue 

 capability extending to collapse depths of fleet submarines. 



292 



