Abstract: A system and method for propelling an underwater diver provides for oral activation of a propulsion means. Specifically, the system includes a mouthpiece in fluid communication with an air tank and electrically connected to the propulsion means via a circuit. A switch is positioned in the mouthpiece such that the diver may bite the mouthpiece to selectively operate the switch and complete the circuit. When the circuit is completed, the propulsion means is activated to propel the diver via a motor that operates an impellor. Preferably, the motor and impellor are contained in a housing along with a power storage device and the air tank.

Abstract: A submersible vehicle includes a hull having at least one main ballast buoyancy tank and an operator compartment. Further, the hull includes an air tank bay for receiving at least one tank of compressed air, and a battery box for holding the vehicle batteries. An opening is formed in the hull for ingress and egress of the operator compartment, and a canopy is mounted on the hull for covering the opening when the canopy is closed. Additionally, the vehicle includes a thruster unit for propelling the vehicle in a direction substantially perpendicular to the surface of the water. Further, a propeller assembly propels the vehicle in a direction substantially parallel to the surface of the water. A buoyancy control system works in concert with the thruster unit and a buoyancy tank to establish the position of the vehicle relative to the surface of the water, and to maintain neutral buoyancy for the vehicle.