Th-j b.^sic VV^ ru'i.o is for tho b-isic h\ill villvout p'.;no^ration3. 

 for the e/ir-lir-S H'i:[-103 ALVIN sphsre, thi inserls for the tenotrations 

 i nc reasGd t.he hv.sic \v/j-^ r.itio l:y acDn^^- ji^a. ^^ln^'-JJ.^ '^£.^^ ■ A c c o r f 1 1 m g ly , 

 tlio corrected V.7Q ratio o'nown aoovo reflects a 11 percent incroar.o on 

 the basic V//.-) ratio. It is noted that or;tiini:',ation of th3 hull irih.erts 

 will probribly result in a sli<;h'oly ligliter striicti:re than ?.ho-..'n. 



The predictions ;:novn above indicate that fro;n a structural 

 standpoint it is possibla to attain an 13,000 ft collapse depth vith a 

 payload increase v/ithin the general range of interest. I'urtlier, since 

 the physical size of the hull (6' -13" CD) a:rl the p/edict-.d collapse 

 depth are v;ithin the capabilities of existing facilities, verification 

 of the predicted collap"e depth for the Titanl'^jn sphere -v-'ill be obtained 

 from collapse tests of a full scale Inill. Additional verification of 

 the adequacy of the precLctio;-i curves v.'ill be obtained from tests of 

 three titiiniua sphere ir.cJels currently under construction, scheduled 

 for testing in Fi69. 



