i^as generated durini^ charging. Because side effects of Hurricane Camille were causing wor- 

 sening weather in the operating area, the entire recovery force was ordered to return to Woods 

 Hole in order to make repairs and to recharge ALUMINAUT's batteries in protected waters. 



The ships left the site late on 19 August, leaving the lift line, with pontoon and watch 

 buoy attached to the bitter end, in place. MIZAR and CRAWFORD arrived at Woods Hole 

 early on 20 August, followed by STAGEY TIDE and ALUMINAUT early the following day. 

 The crews were confident that with a properly operating submersible they would be able to 

 retrieve ALVIN on the next attempt. 



REPAIRS AND SALVAGE PLAN MODIFICATION 



Repairs to known malfunctions were accomplished quickly at Woods Hole on 21 August. 

 However, during testing, a malfunction developed with a manipulator, which necessitated re- 

 moving ALUMINAUT from the water. ALUMINAUT was sent to Boston on 22 August, where 

 she was lifted out and repairs effected. 



Because the original pendant holding the toggle was fouled on ALVIN, an alternate meth- 

 od of placing the primary lift device was prepared. A new toggle bar was built with a basic 

 structure identical to the original one; however, aluminum angle was placed over the toggle 

 handle pipe to form a square s,ection, and the syntactic flotation material was placed on one 

 side with a standoff. This arrangement allowed ALUMINAUT to grasp the toggle bar handle 

 at any point. Since the only syntactic foam material available was of relatively high density 

 (39 pounds per cubic foot), the maximum toggle bar dimension was increased to 16 inches, 

 which made it difficult to handle through ALVIN's 20-inch hatch. 



Attached to the toggle was a 25-foot nylon pendant with a snap hook on the tag end 

 which was to be snapped onto the ring at the lower end of the lift line. It was planned to 

 lift ALVIN from one point using the toggle bar as the only lift device. This was considered 

 safe, because visual inspection indicated that the joint between ALVIN's fore- and after- 

 bodies was in excellent condition. In addition, equitable division of the load between the 

 toggle and stern hook would be difficult to achieve if a two-point lift were to be attempted. 



ALUMINAUT's floodlight boom, removed to make room for the lift line, was replaced 

 on her bow. A system was rigged to carry the toggle on the boom, leaving both of her manip- 

 ulators free (figures 15 and 16). It was planned that ALUMINAUT would, as before, use 

 her manipulators to grasp the steps and lifting padeyes on ALVIN's hull. When ALUMINAUT 

 was in an almost vertical position, she would lower the bar into ALVIN's hatch and trip the 

 holding pin so that the bar would swing perpendicular to the hatch and become securely 

 lodged. She would then grasp the tag end of the toggle line and snap it into the lift line ring. 



26 



