CONCLUSIOIIS 



1. An 18,000 ft collap3e depth with a !nini;,ivjr. of 1975 pourid payload 

 increane is possible for a titanium, sphore of the :3-.rr,e outride dlTi::;n- 

 sions as ALVIN. The following basic thicknesses are required for the 

 yield strengths shov;n: 



a. 100,000 psi yield - 1.81 inches 



b. 110,000 psi yield - 1.72 inches 



c. 120,000 psi yield - 1.65. inches 



2. The inserts for the view ports and hatch can be cptimized from the 

 existing for a further slight weight saving. 



3. Additional forward viewing capabilities can be acco,T!inodat.ed. 



4.. Additional electrical penetrators to be corapatible with the AUTEC 

 vehicles can be accciruiioiated. 



5. Binding of the hull release mechanism is not considered a problem. 



6. Two prototype hulls should be constructed - one for cyclic, creep 

 and collapse tests; the other for use in ALVIN/AUTEC. 



u 



