Abstract: A wearable electronic device for diving provides audio feedback underwater by using a housing that retains a piezoelectric device, a memory storing audio data, and a depth sensor. A processing element determines the current depth based on signals from the depth sensor, accesses the stored audio data, and controls the piezoelectric device to vibrate the housing. These vibrations generate audio frequency signals that radiate into the water, with the vibration pattern modulated according to the device's depth.

Abstract: A topside buoy system is disclosed for relaying a status of a diver between a monitoring station and a diver's wearable device and scuba tank pod. The communication may be carried by sonar signals underwater and may be transmitted by short-range communication methods through air. An application on the command station may display diver status information and may receive and transmit messages between the command station and the wearable device of the diver via the topside buoy. The diver location data may be determined relative to the topside buoy by determining a time delay of the sonar signal between the wearable device and the topside buoy, by a plurality of transducers configured to detect an angle from which the sonar signal originated, and a depth of the diver included in the sonar signal.

Abstract: A topside buoy system is disclosed for relaying a status of a diver between a monitoring station and a diver's wearable device and scuba tank pod. The communication may be carried by sonar signals underwater and may be transmitted by short-range communication methods through air. An application on the command station may display diver status information and may receive and transmit messages between the command station and the wearable device of the diver via the topside buoy. The diver location data may be determined relative to the topside buoy by determining a time delay of the sonar signal between the wearable device and the topside buoy, by a plurality of transducers configured to detect an angle from which the sonar signal originated, and a depth of the diver included in the sonar signal.

Abstract: A dive computer comprises a display, a stylus, an electromagnetic touch panel, and a processor. The electromagnetic touch panel is configured to detect a position of the stylus and differentiate between a first and a second end of the stylus based on the first and second resonant frequencies of coils positioned within the stylus. The processor is configured to provide a writing function based on the position of the first end of the stylus, provide an erasing function based on the position of the second end of the stylus; and control the display to present an indication of the writing function and the erasing function.

Abstract: A topside buoy system is disclosed for relaying a status of a diver between a monitoring station and a diver's wearable device and scuba tank pod. The communication may be carried by sonar signals underwater and may be transmitted by short-range communication methods through air. An application on the command station may display diver status information and may receive and transmit messages between the command station and the wearable device of the diver via the topside buoy. The diver location data may be determined relative to the topside buoy by determining a time delay of the sonar signal between the wearable device and the topside buoy, by a plurality of transducers configured to detect an angle from which the sonar signal originated, and a depth of the diver included in the sonar signal.

Abstract: A method and composition for combining ceramic powder and binder to form green elements suitable for shaping and firing uses dry blending techniques. The binder includes a particulate wax component that is not melted in order to combine it with the ceramic powder, but rather, the wax component is combined in particulate form with the ceramic powder. The particulate wax is mixed in conventional blender apparatus in a relatively short time period. The binder composition may also include a lubricity enhancer or slip agent and a dispersion or colloidal binder.