Underwater light adaptor for single-hose diving regulators

Underwater operating unit

Underwater pipe-laying vessels and methods

Underwater propulsion device

Underwater riser and ship connection

Underwater riser and ship connection

Underwater sampling and mapping apparatus

Underwater scouring apparatus

Underwater servicing device

Underwater shock protection device

Underwater tow system and method

Underwater towed support device

Underwater two phase ramjet engine

Underwater vehicle and method of positioning same

Underwater vessel with improved propulsion and handling

Underwater viewing vessel

Underwater visibility device

Underwater window for vessels

Unitary buoy

Universal depth boat