A method and apparatus for automatically controlling partial pressure of oxygen in the breathing loop of a rebreather diving system. A diver may adjustably select a control parameter to maintain partial pressure of oxygen at a setpoint that varies with ambient pressure and is within a range between a maximum safe partial pressure of oxygen at depth and a minimum safe partial pressure of oxygen for the purpose of biasing the performance of the rebreather either towards minimizing gas venting from the rebreather breathing loop or minimizing decompression time. A method and apparatus for managing and monitoring the use of dive resources in comparison with a target dive time specified by the diver, calculating and indicating remaining dive time based on dive resource values and calculating and indicating dive resource values required to meet preselected dive resource end values and dive requirements.

A support (30) for mechanically coupling a plurality of diver propulsion vehicles (1), each configured for propelling at least one diver, wherein the support (30) is configured for mechanically coupling the plurality of diver propulsion vehicles (1) selectively side-by-side or longitudinally via the support (30), wherein the support (30) is foldable around a joint (31) and convertible between a folded state in which the plurality of diver propulsion vehicles (1) are mechanically coupled side-by-side, and an unfolded state in which the plurality of diver propulsion vehicles (1) are mechanically coupled longitudinally.

Apparatuses, methods, and program products are disclosed for changing underwater device operation. One apparatus includes a sensor, at least one memory, and at least one processor coupled with the at least one memory and configured to cause the apparatus to: receive, by use of the sensor, data corresponding to an environmental factor; determine whether the data indicates that the apparatus is underwater; and, in response to the data indicating that the apparatus is underwater, change operation of the apparatus.

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 dive computer with software algorithm and graphical user interface that provide critical real-time information to a recreational scuba diver while scuba diving. The algorithm takes depth and time data and the diver's specified options to calculate all the necessary dive information and presents it to the diver in a single graph. Based on the algorithm's calculations, the graphical user interface gives the diver a visual representation of the water column, the diver's depth in the water column, and the corresponding depth limits. The interface shows the diver in real time where the diver is in relation to the water column and shows the diver the depth limits which are too deep or too shallow, and where the diver should be to complete the dive safely.

Proposed is a wearable device for scuba diving that is worn on the user's body when scuba diving. The device is intended to allow users to effectively enjoy the underwater environments. The device includes a mask part worn on a user's head, and a wearable part worn on a user's waist or arm.

The present invention relates to a waterproof device for diving including a mobile terminal and an openable and closable waterproof housing for diving adapted to detachably mount the mobile terminal thereonto, wherein the mobile terminal includes an I/O module for displaying at least one of an information pop-up and a functional mode, a first sensor part for detecting internal pressure of the waterproof housing for diving, and a control unit for determining whether the waterproof housing for diving is normally fastened using the detected internal pressure.