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