Abstract: A water saddle is formed of a unitary member of expanded plastic such as polystyrene having closed cells on it surface. The saddle includes a center seat located between end sections. The center of the seat portion is narrower than the end sections and includes tapered surfaces to be grasped by a riders legs which extend to a bottom surface which curves downwardly from one end section to a maximum depth below the seat portion and them upwardly to the other end section. The saddle is designed such that the center of buoyancy of the combined saddle and rider is significantly below the surface of the water, leaving the rider's arms, shoulders and head out of the water.

Abstract: Novel display scheme for decompression data is herein presented which can be animated by various types of decompression computers and permits the use of new, highly advantageous procedures in many aspects of diving, notably: (1) no-decompression diving, (2) decompression diving, and (3) repetitive diving. It allows a diver to choose his margin of safety, lending itself to use by divers predisposed to DCS, or by divers working under arduous conditions. It consists of graphical and digital display elements which accesses the contents of a microprocessor or other information source as to a diver's tissue's state of saturation with inert gas. This information is presented to a diver in a simple, straightforward and non-confusing manner which allows him/or to use the new highly advantageous procedures.