Abstract: An underwater recreation system for diving instruction and method of its use. The method includes providing a series of learning steps with diving techniques and instructions to practice at incrementally deeper depths and providing a surface floating depth limitation device that restricts the learning user to the particular maximum depth of their learning step. The apparatus for carrying out the method of diving instruction includes a surface floating depth limitation device with the means to connect to the breathing hose of a surface supplied air supply.

Abstract: An inflatable flotation chamber comprising a seamlessly constructed flexible tube, sealed ends, and a valve for inflation and deflation. Said chamber characterized in that it can be inflated to a relatively high pressure, giving functional shape and independent structural rigidness to the chamber. A watercraft characterized by one or a multitude of such inflatable flotation chambers. A method of constructing such an inflatable flotation chamber.

Abstract: An inflatable flotation chamber comprising a seamlessly constructed flexible tube, sealed ends, and a valve for inflation and deflation. Said chamber characterized in that it can be inflated to a relatively high pressure, giving functional shape and independent structural rigidness to the chamber. A watercraft characterized by one or a multitude of such inflatable flotation chambers. A method of constructing such an inflatable flotation chamber.

Abstract: An underwater recreation system for diving instruction and method of its use. The method includes providing a series of learning steps with diving techniques and instructions to practice at incrementally deeper depths and providing a surface floating depth limitation device that restricts the learning user to the particular maximum depth of their learning step. The apparatus for carrying out the method of diving instruction includes a surface floating depth limitation device with the means to connect to the breathing hose of a surface supplied air supply.

Abstract: A refrigerator or liquid dispensing appliance adapted for receiving, storing, managing, processing and dispensing a liquid enhancement component for preparation of a finished beverage is disclosed. Delivery, processing and management of the liquid enhancement component includes loading a solid liquid enhancement component at a product interface, and managing the transfer of the liquid enhancement component through various systems of the invention including processing to provide a processed liquid enhancement component for discharging for preparing a finished beverage.

Abstract: A refrigerator or liquid dispensing appliance adapted for receiving, storing, managing, processing and dispensing a liquid enhancement component for preparation of a finished beverage is disclosed. Delivery, processing and management of the liquid enhancement component includes loading a solid liquid enhancement component at a product interface, and managing the transfer of the liquid enhancement component through various systems of the invention including processing to provide a processed liquid enhancement component for discharging for preparing a finished beverage.