Passive controlled buoyancy apparatus
Pelagic free swinging aquatic vehicle
Personal submersible marine vehicle
Personal water propulsion system
Personal watercraft
Phanton computer gating system
Polyhedrally stiffened cylindrical (PC) pressure hull
Position interlock system for submarine masts and closure
Power storage for marine seismic vessel
Powered swimming aid
Pressure compensation method and apparatus for underwater equipm
Pressure equalizer
Pressure tight hull convertible submarine
Pressure-balanced gas turbine underwater launcher
Pressure-sustaining vessel
Process and apparatus for handling a diving machine
Process of protecting an object from sound waves
Propeller system with electronically controlled cyclic and colle
Propulsion and steering mechanism for an underwater vehicle
Propulsion device for swimmers and divers