tor and is located in a housing directly be- 

 neath the bottom plate of the pressure hull, 

 with pressure compensation being provided 

 by reference to the hydraulic distribution 

 housing. The winch motor drives a drum 

 which holds 1,200 feet of V4-inch non-rotating 

 wire rope. The winch features a barrel gear 

 level wind assembly and cable guide to as- 

 sure proper cable laying. The guide also 

 houses a hydraulic cable cutter, pyrotechnic 

 cable cutter and an interlock sensing assem- 

 bly to override the winch control. This inter- 

 lock arrangement automatically slows and 

 stops the winch as the anchor approaches 

 NEMO. 



Winch operations are controlled by 

 four switches on a control console. The winch 

 motor switch and the winch jog switch sup- 

 ply power to the winch speed and direction 

 switches, which in turn actuate hydraulic 



solenoid valves. The winch motor switch is 

 used for continuous operation, and the jog 

 switch is used for momentary operation. If 

 the hydraulic generator is on and either the 

 jog or the run switch is actuated, the winch 

 will start operating in the direction selected 

 by the direction switch ("reel in" or "reel 

 out") and at the speed selected on the speed 

 switch ("fast" or "slow"). The winch lock 

 switch actuates a solenoid valve which pro- 

 vides a hydraulic lock on the winch motor. 

 This lock is automatically overridden when 

 either the run or jog switch is used. In 

 addition, the winch has four ways in which it 

 may be free-wheeled. To reset the interlock 

 system (which automatically slows and then 

 stops the incoming anchor before it reaches 

 the winch), the jog switch is operated twice. 

 A 25-in.^ accumulator is incorporated in the 

 winch motor hydraulic loop to cushion sud- 



/ 



/ 



/ 



\ 



\ 



SUPPORT 

 SHIP 



N 



DESCENT WEIGHT (220-lb) 

 PRODUCES NEGATIVE 

 BUOYANCY FOR 

 POWER-FREE DESCENT 



HELICAL DESCENT PATH DUE TO 

 FREE DESCENT DYNAMICS 





/ 



\ 



ASCENT WEIGHT (187-lb) RELEASED AT 



CONCLUSION OF MISSION 



DEEPSTAR IS NOW POSITIVELY 



BUOYANT AND RISES 



PITCH CONTROLLED BY 

 SHIFTING OF MERCURY 

 \ FORWARD AND AFT 



\ 



\ 



\ 



AT DESIRED OPERATING DEPTH 



DESCENT WEIGHT IS RELEASED 



TO MAKE DEEPSTAR NEUTRALLY 



BUOYANT 



ASCENT WEIGHT 



MOVEMENT FORWARD AND 

 AFT USING PROPELLERS 



~~^1 



DESCENT WEIGHT 



Fig. 6.5 DEEPSTAR 4000's descent/ascent weight system. 

 295 



