Abstract: A wearable electronic device comprises a housing, a feedback device, a depth sensor, and a processing element. The feedback device is located in the housing and configured to generate a vibration. The depth sensor is configured to generate a signal indicative of a current depth of the housing. The processing element is in electronic communication with the feedback device and the depth sensor. The processing element is configured to determine the current depth based on the signal indicative of a current depth and control the feedback device to generate the vibration in a pattern indicative of a rate of change in depth based at least in part on the current 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.