chapter 12 

 MODIFICATIONS AND OUTFITTING OF THE SEALAB II HABITAT 



W. B. Culpepper 



U. S. Navy Mine Defense Laboratory 



Panama City, Florida 



and 



E. P. Carpenter 

 Naval Ordnance Laboratory 

 Pasadena, California 



Originally, the Sealab II habitat was to have only final outfitting and trim tests performed 

 while at Long Beach Naval Shipyard. However, due to schedule changes, design reevaluations, 

 and the requirements of the Certification Board, a number of modifications were necessary 

 (see Fig. 49 for valve locations). 



These modifications, with the reasons for their accomplishment, are listed below. 



I. Exterior Modifications 

 Item 



1. Install guards at forward end of bottle- 

 storage racks. 



2. Shorten external portion of water closet 

 overboard drain line. 



3. Add expanded metal bin on starboard 



side. 



4. Install valve from vent valve B-3 to 

 top of skirt. 



5. Remove protective cover from valve 

 B-3. 



6. Install padeyes on top of shark cage. 



7. Add miscellaneous hooks inside skirt. 



8. Add vent valve A- 10. 



Reason 



Protect high-pressure piping and valves. 



Less vulnerable. 



Additional exterior storage. 



Blowing skirt; pressure equalization during 

 tidal changes. 



Better access to valve handle. 



Attachment of dumbwaiter line. 



For handing equipment. 



Permit venting tank No. 4 while maintaining 

 pressure equalization between other tanks 

 and interior. 



n. Umbilical cord Modifications 



1. Replace air hose, gas-supply hose, and 

 gas-sampling hose. 



Original hoses kinked and unusable. 



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