Dive computers in accordance with embodiments of the invention are disclosed that store information concerning a dive site. The stored information can be accessed during the dive to provide information concerning such things as points of interest and/or hazards. One embodiment of the invention includes a processor, memory connected to the processor, a pressure transducer connected to the processor and configured to measure depth, and a display connected to the processor. In addition, the memory contains factual information concerning a dive site, and the processor is configured to display at least a portion of the stored factual information concerning the dive site via the display.

A diving apparatus (10) supplies breathing air (L) and includes a basic body (12), a tank interface (20), a pressure reducer (22), a mouthpiece interface (24), and a display device (30). The tank interface connects to a breathing air tank (90) for the inlet of breathing air into the diving apparatus. The mouthpiece interface is configured for connection of a mouthpiece (92) for the supply of breathing air from the diving apparatus. The pressure reducer is arranged in a gas path of the diving apparatus between the tank interface and the mouthpiece interface for reducing gas pressure. The display device includes a display instrument (32) and a display line (34). A holding element (40) is configured to detachable fasten the display line at the basic body. A diving system (100) is provided including the diving apparatus (10), a breathing air tank (90) and/or with a mouthpiece (92).

The invention concerns a method, device and computer program product for monitoring or planning a dive of a diver. The method includes providing data on the composition of gases breathed by the diver during the dive, providing data on the depth or ambient pressure of the diver, and using a model to provide a safe ascent profile for the diver based on the data on the composition of gases and on the depth or ambient pressure. According to the invention, the method further comprising detecting, based on the data on the composition of gases, a gas composition change which may lead to a deep tissue isobaric counter diffusion situation, and the model comprising means for immediately temporally retarding the ascent profile if such gas composition change is detected. The invention can be used to mitigate the harmful effects of dangerous breathing gas changes during diving.

A tablet-like device is configured to have a slightly negative buoyancy and to hold a sheet of waterproof synthetic paper, or another removable, waterproof recording sheet, onto which notes or messages or sketches can be recorded via a writing implement, in an underwater or marine environment, or another extreme or severe environment. Since the tablet device is configured for use of sheets of waterproof synthetic paper, divers can work with their own personal pre-printed material underwater. Further, the tablet device also has the advantages of cost savings and reduced environmental impact.

According to an example aspect of the present invention, there is provided an apparatus comprising memory configured to store a dive log, at least one processing core configured to receive the dive log from a dive computer, the dive log comprising information concerning a dive, the received dive log not including a location where the dive took place, obtain a geographic location of the apparatus, and add the location where the dive took place to the dive log based at least in part on the geographic location, and/or provide the dive log and the geographic location of the apparatus to a server.

Disclosed herein are systems and methods for providing VR/MR experiences to users in water through a headset and at least one special-effects device. During a VR/MR experience, a controller may send commands to a special-effects device at particular times to cause the special-effects device to create effects in synchronism with the visual portion of the VR/MR experience. A headset application that provides the visual portion of the VR/MR experience may communicate with the controller before the experience begins to establish the identity of the experience and the start time. The VR/MR experience may be selected by reading a storage medium (e.g., a near-field communication (NFC) card) that identifies the experience and/or the controller. Some information on the storage medium may be included in a metadata file transferred to the application. The application may send information read from the storage medium to the controller via an over-the-air network.

An underwater navigation system that includes a buoy configured to be anchored underwater or to be hung underwater from a boat. The buoy is configured to transmit a signal. A dive computer is configured to be carried by a diver, and also configured to receive the signal. The dive computer is further configured to display a distance and direction to the buoy based on the received signal.

The invention concerns an antenna assembly for a wearable or wrist worn device, the device being suitable for underwater communications, comprising a casing, comprising an inductive coil antenna, wherein the inductive coil antenna is attachable to a housing and said housing, comprising a first radio operating on a first frequency band for communication underwater and a second radio operating on a second frequency band for communication over air interface, wherein the second frequency band is higher than the first frequency band, and the first and the second radio operate using the inductive coil antenna when said casing is attached to said housing.

An underwater case contains a device for use in wet and dry conditions, such as underwater, extreme hot or cold conditions, or the like. The underwater case includes one or more waterproof seals to keep a contained device safe. The case includes a controller including a non-volatile memory and processor, a radio module configured to provide a short-range wireless connection between the controller and the device and an integrated connection module configured to activate the device. The case includes an input component connected to the controller and configured to receive one or more inputs from a user and transmit, via the short-range wireless connection, instructions to the device based on the one or more inputs.

A self-contained surface supplied air system preferably provided with backpack-wearable capability and automated setup functions for ease of use that is capable of recording valuable recreational and scientific data in an unobtrusive manner. The flotation tube process for the system can be automated to reduce setup time and electronically regulated to increase reliability and safety. The system allows recreational divers or their inherent equipment to be capable of recording valuable and reputable data in a manner that does not involve extra effort by the user. The disclosed system can use a miniature pH sensor design with automatic calibration for integration into the data recording device. In one embodiment, the novel hookah diving system comprises a portable body enclosing all necessary equipment and featuring automatic flotation tube inflation and deflation. An integrated data recording device collects physical data at points along the diver's tether preferably from the surface all the way to the depth of the diver.