106 HANDLING CHARACTERISTICS 



13. Inspect 3-1/2-in. nylon at bull nose attached to buoy. If line is good, remove buoy and 

 bend additional line and pass to Gear. 



14. Attach 3-1/2-in. nylon to stern bull nose of Sealab and lead to No. 2 Station aboard 

 staging vessel. 



15. Disconnect and remove counterweight and dumb waiter system. 



16. Open valve A- 10 and then A-1. 



17. Open valve C2 to blow tank 2. While tank 2 is blowing, maintain pressure in Sealab and 

 blowing system via the air salvage hose, and then the umbilical as an alternate means for pres- 

 surization to 15 psi over bottom. Caution : Do not exceed 125 psig. 



18. The normal lift off weight of Sealab should be about 12,000 lb. However, due to the 6 

 degree list and trim, tank C-2 cannot be blown clean of water until Sealab is reasonably level. 

 The water remaining in C-2 after it is blown at the present 6 degree list and trim is estimated 

 at 2,000 lb. It may be necessary to take a pull at the stern bull nose with 3-1/2-in. nylon at 

 about 5000 lbs. to help level Sealab before it leaves bottom in addition to the 12,000-lb pull on the 

 lifting wire. 



19. As C-2 is being blown, take a moderate strain of about 12,000 lb and observe inclinom- 

 eter. Assist in leveling Sealab with 3-1/2-in. nylon at stern buUnose staging vessel station 

 No. 1. 



20. When C2 starts to bubble when Sealab is level, close valve C-2. Then close A- 10 and 

 then A-1. C-2 may not be left open since pressure inside Sealab would drop to at least less 

 than bottom pressure at the main access hatch. A-1 and A- 10 are closed to isolate the system 

 in the event of failure in the air salvage system while raising. 



21. Take a strain of at least 12,000 lb to lift Sealab off bottom. This may require a con- 

 tinuing pull of 30 minutes or more to break out the Sealab spades. The nylon lines at bow and 

 stern may be used to assist. Note attitude of Sealab via inclinometer. Note any change in in- 

 ternal pressure of Sealab and look for leaks. 



22. After Sealab is off bottom hoist slowly to 60 ft, noting any pressure changes in Sealab. 

 Maintain not less than 15 psi in Sealab over bottom at all times in the event of air leaks by 

 adding air thru umbilical. 



Note: Tanks and Sealab are isolated from the salvage air system by having valves A-1, A- 10 

 and A- 8 closed. Keep moderate strain on nylon lines to keep Sealab from rotating. 



Phase 3 



Sealab at 60 ft to bottom of pressure cylinder and basically perpendicular to stern of 

 Berkone pneumofathometer gage reading should be 44 ft (60-16). Pressure inside Sealab, if 

 there are no leaks, should be essentially the same as it was on the bottom or about 100 psig. 



At the 60 ft stop do following: 



a. Inspect for leaks 



b. Remove excess lines 



c. Attach 2 6-in. nylon lines from fore and aft bull nose to stations 1 and 2 of Berkone. 

 Similarity pass 2 6-in. nylons to station 3 and 4 of the Gear. See sketch. 



d. Rotate Sealab clockwise about 90 degrees so that it is roughly parallel to the stern of 

 Berkone. 



