Umbilical constraint mechanism
Undersea launcher for a tethered device
Undersea vehicle propulsion and attitude control system
Underwater apparatus for acoustically inspecting a submerged obj
Underwater apparatus release mechanism
Underwater breathing apparatus
Underwater buoyancy apparatus
Underwater craft having sealed and inflatable buoyancy chambers
Underwater cruise device
Underwater deposit-recovery scooper and specimen storage...
Underwater dive vehicle
Underwater dive vehicle
Underwater diving plane
Underwater exploration device
Underwater explosion test vehicle
Underwater hull or tank
Underwater inspection measurement survey
Underwater maneuvering device
Underwater motive device
Underwater nuclear material reconnaissance system