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.

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.

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.

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.

An artificial gill garment (100) is provided for providing oxygen to a wearer in an underwater environment. The artificial gill garment comprises a membrane (110) configured to allow permeation of air through the membrane and prevent permeation of water through the membrane. The membrane is configured to provide an air reservoir. A method of manufacturing the artificial gill garment is also provided.

A communication device includes a mouthpiece intended to be worn in the mouth of a subject including an acoustic conduction plate intended to be bitten by the user; and a vibrating element configured to convert an audio input into an acoustic output, the vibrating element being coupled to the acoustic conduction plate so as to transmit said acoustic output to the plate.

An artificial gill for enabling a user to breathe when in an underwater environment is provided. The artificial gill comprises a membrane configured to allow permeation of gas through the membrane and prevent permeation of water through the membrane. The membrane is made from or comprises polymethyl pentene, PMP. The artificial gill comprises a gas reservoir at least partially enclosed by a first surface of the membrane for providing gas for a user to breathe. The artificial gill also comprises a water flow device configured to direct a flow of water over a second, opposite surface of the membrane.