Abstract: A flexible envelope made of water-tight material, such as rubber or plastic, partially filled with water, having a bubble of air at its upper end, and a weight at or attached to its lower end, the envelope being shaped and decorated for visual effect, when in use floating submerged in a body of water so as to provide a recreational or informational object.

Abstract: A magnetic compass in which a conventional compass card provides an analog readout of compass heading and a binary coded digital disk together with fiber optic sensing technology provides a digital readout of compass heading contained within a single housing, together with a gravity driven inclinometer providing a measurement of the inclination of the ground. The compass magnet is shielded by Faraday type shielding from the electronics that processes the digital reading. An analog electronic readout of both compass heading or inclination, capable of remote display, is provided by a tapered iris disk and fiber optic reader combination. A magnetic compass employing a compass disk with a reflecting tapered iris on one side of the disk sensed by a reflecting fiber optic reader and a standard compass card on the other side which can be read visually provides an improved magnetic compass being very compact and providing both analog and digital readouts.