hull construction 254 



launch retrieval logistics 300 



Trim 7 



defined ^^-^ 76 



requirements for 16 



systems external to pressure hull 304 



ballast weight drop 306 



battery shift 306 



MBT differential fill 306 



mercury transfer 304 



oil transfer 307 



shot hopper differential fill 306 



VBT differential fill 304 



water transfer 306 



systems inside pressure hull 301 



water transfer 302 



weight shift 304 



systems, vehicle-by-vehicle 306 



TS-1 229 



TUDLIK 5, 189 



TURTLE (Bushnell's) 1 



TURTLE (USN) 57 



described 193 



Udall, Stewart 44 



UNDERSEA HUNTER, M/V 586 



Underwater telephones 679 



Unigator 508 



University of Pennsylvania 571 



University of Pennsylvania Museum 48 



Unmanned vehicles 703 



URF 



U.S. Air Force 171 



U.S. Army 172 



Usury. Dick 593, 615 



UZUSHIO 85 



Variable ballast systems, vehicle-by-vehicle 286 



Vassena, Pietro 39 



VAST MKII 145 



Vernon, James 625 



VICKERS VOYAGER, M/V 183 



VICKERS VENTURER, M/V 183 



Viewports, conical acrylic plastic 261 



flat acrylic plastic 260 



properties of glass and plastic 259 



recommended design and seals 261, 262 



requirements 16 



Vigil, Arthur 480 



Vincent, C. R. 34 



Vine, Alyn 44, 606 



VIPERFISH 85 



VOL-Ll 64 



described 237 



Volume (free), in various vehicles 450 



761 



