Abstract: A water skiing disk that is used by a water skier at slow speeds does not require bindings or other similar types of foot constraints and has a large exterior diameter dimension to hold up one or more skiers on the water at slow speeds while being light weight and easily transported by a single person.

Abstract: A transportable fluid pressure operated lifting jack comprises a load platform and a base platform with a bellows type fluid pressure expandable air bag secured between the platforms. A self-contained source of fluid pressure is supported on the jack and is selectively communicated with the air bag to raise the load platform and an object it supports, or is selectively exhausted to lower the load platform and the object is supports. Vertical guide bars extend between the load and base platforms and guide the upward, vertical movement of the load platform relative to the base platform.