All acUlilional poiUooii was attached, and two more were made ready <jn deck in case they 

 were required. 



FINAL LIFT FROM WATER 



MIZAR arrived at Menemsha Hij^ht at 1630 on 31 August. Upon arrival, ALVIN was 

 i)rou^ht alongside and preparations were made For the i'inal lift. All pontoons except one 

 were renio\ed and hroui;ht aboard MIZAR. The tosJ.gle bar was disassembled and removed 

 from liie pressme sphere. 



On the morning of 1 September, a barge with a mobile crane aboard was brought along- 

 side MIZAR. The crane's hook was attached to ALVIN's lifting bridle, the remaining lift 

 pontoon was removed, and ALVIN was lifted to the surface. Her pressure sphere was then 

 pumped out using portable gasoline-driven pumps. 



Because inspection of ALVIN revealed that her stern lift fitting was slightly deformed 

 indicating weakening, a wide nylon strap was rigged around the after-body. ALVIN was then 

 lifted aboard the barge and placed in a cradle (figures 23 through 27). 



When ALVIN had been secured on the barge, the barge was towed to Woods Hole where 

 ALVIN was placed ashore asid delivered to a representative of the Office of Naval Research. 



CONCLUSIONS 



As the final phase of the salvage efforts ended, the preservation and restoration of ALVIN 

 began. All portable equipment was removed and placed in large tubs of fresh water. Equip- 

 ment which could not be removed was thoroughly flushed with fresh water to reduce the 

 effects of corrosion. Complete restoration is expected to require many months of effort. 



The recovery of ALVIN is by far the deepest underwater recovery of an object of this 

 size that has ever been successfully completed. The unparalleled success of this operation 

 proves the Navy's capability of working in the deep ocean. 



This operation, while a first, emphasized that no operation in which work in the deep 

 ocean is undertaken is routine, and that each phase of the operation must be carefully and 



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