Abstract: A method and apparatus for protecting a camera or other apparatus from a water environment with a flexible, pressure compensated bag-like housing which is maintained at a slight positive pressure. The housing is larger than its contents to permit the contents to be moved relative to at least one wall to activate controls by frictional engagement between the wall and control during the relative movement. The housing may be configured as a merchandising container for the contents.

Abstract: A method and apparatus for pressure compensating an under water housing which includes a tubular structure sealed around a hole in the housing dimensioned so that the mouth of an inflated balloon will form a secure seal there on so that the housing may be pressure compensated by blowing up the balloon and sealing the balloon mouth around the tube.

Abstract: A method and apparatus for pressure compensating an underwater housing by blowing up a balloon and sealing the balloon mouth around a conduit to pneumatically connect the balloon to the interior of the housing. The balloon is configured to change its appearance either structurally or via indicia to provide a variable indication as to what depth it will provide compensating air. The indication varies in response to the amount the balloon stretches to accommodate the air forced into the balloon as it is blown up.

Abstract: An apparatus for extending the depth range of an underwater pressure hull such as an underwater camera body by providing a means responsive to ambient pressure for equalizing the pressure between the hull and its environment.

Abstract: A container for adapting a device such as a video camera, camera, strobe light, etc. for underwater operation by providing a flexible, waterproof container and a means to pressurize the container prior to or during immersion. In numerous embodiments, the apparatus includes a pressurizing means responsive to ambient water pressure.

Abstract: An apparatus and method for extending the depth range of an underwater pressure hull such as an underwater camera body by supplying gas to balance the internal hull pressure with the ambient water pressure. The balancing gas is supplied by a variable volume reservoir pneumatically connected to the pressure hull. The reservoir is reduced in volume by an increase in ambient water pressure to thereby increase the internal pressure of the system according to Boyle's Law. Conversely, a decrease in ambient water pressure results in an increase in the reservoir volume which reduces the internal hull pressure accordingly.