A method for determining a displacement of an anchor is provided. The method includes the steps of: determining an initial position of the anchor; and determining a displacement of the anchor. The step of determining the displacement of the anchor includes (i) measuring anchor velocity values, (ii) measuring at least one further physical quantity associated with the anchoring, (iii) deciding whether the anchor is at rest or in motion, wherein a value of the further physical quantity is taken into account in the decision, and (iv) integrating the velocity values over time during intervals when the anchor is deemed to be in motion.

Exemplary systems enable operation of mobile devices underwater. Antennas on a buoy assembly allow a mobile device to maintain wireless communications. A series of cable segments connect a buoy assembly to a waterproof case capable of sealing a mobile device.

Structural arrangement for a water ski or underwater ski comprising essential mechanisms for significantly improving the user experience in underwater wake bodyboarding. The ski is characterized by the addition of novel and different attachable items that enable the ski to be used without a powered vehicle. The ski is also characterized in that it has various different items that can be attached to the cowling to improve the performance and comfort of the equipment, combined with a personalized steering system and an essential safety system, providing a model that is unique on the underwater ski/water ski market.

Implementations of communication devices may include: a housing having a hollow compartment in a waterproof shell. The waterproof shell may be configured to float on a surface of water. The communication device may include a computing system having a memory and a processor within the hollow compartment of the housing. The communication device may include an onboard power unit electrically coupled with the computing system. One or more radios may be coupled with the housing and with the onboard power unit and the computing system. The one or more radios may be configured to act as a gateway by receiving data from one or more watercrafts and transmitting the data to one or more receivers over a radio telecommunication channel.

An autonomous boat capability for man or unmanned vessels to build a contextual understanding of the marine environment to identify situations of collisions, man-overboard, intrusion and taking appropriate action based on context. This includes imaging (conventional camera, ToF camera, depth camera, thermal cameras, radar, lidar) and audio (microphone, sonar, sonic) sensors, compute device to build environmental understand, recognition, and compute optimal route navigation, controller to manage heading, controller to handle propulsion, display for latest marine information and navigation data, speakers to alert crew, horn to signal to other vessels.

A laser-powered ice-penetrating communications payload delivery vehicle for sub-ice submarine missions enables under-ice operations to exchange information with terrestrial facilities or satellite networks with communications methods otherwise blocked by an ice cap. The vehicle comprises an electronics bay, a payload bay, optics bay, and a melt optic with laser. The system and method of establishing communication where the vehicle, tethered to a sub-ice vessel, is released. The vehicle ascends to the bottom of an ice sheet and uses a laser to melt the ice, forming a borehole through which the vehicle continues to ascend. When buoyancy no longer advances the vehicle beyond sea level, the vehicle continues to melt a conical opening through the ice until unobstructed atmosphere is reached and bi-directional communication is established. Where the melting capacity cannot reach ice to continue melting, the vehicle mechanically advances itself toward the surface to establish high bandwidth, bi-directional communication.

An underwater communications system includes a network communication interface, one or more computer processors, and a memory containing computer program code that, when executed by operation of the one or more computer processors, performs an operation. The operation includes storing a plurality of data packets to be transmitted to a destination device, determining that data communications over the network communication interface have become available for a first network node, and determining that the first network node has a valid security credential. Additionally, the operation includes, upon determining that the first network node has the valid security credential, transmitting the stored plurality of data packets over the network communication interface to the first network node. The first network node is configured to employ store-carry-and-forward data messaging techniques to transmit the plurality of data packets towards the destination device.

A computer implemented method for providing marine vessel data of a marine vessel with a plurality of sensor devices includes receiving a first sensor data item with first sensor data of a first sensor device of the plurality of sensor devices, associated with a first local timestamp generated based on a local clock; receiving a second sensor data item including second sensor data of a second sensor device of the plurality of sensor devices, associated with a second local timestamp generated based on the local clock and a first universal timestamp generated based on a universal clock; determining time correction value based on the second sensor data item's second local timestamp and the universal timestamp; and generating time information for the first sensor data of the first sensor device using the first local timestamp and the time correction value.

An autonomous watercraft with a waterproof container that houses a satellite communication terminal. The waterproof container includes a first shell mounted on a deck of the watercraft and that has a sealed first interior space that contains satellite communication circuitry of the terminal. The waterproof container also includes a second shell mounted under the deck of the watercraft and that has a sealed second interior space that contains the processing circuitry of the terminal. The first and second shells include ports configured to receive connectors for communication signaling and/or power. The first shell can also include a pressure port to pressurize the first interior space for use in leak detection. The shells can also include heat sinks to cool the satellite communication terminal.

A remotely-controlled observation vehicle for observing swimmers is disclosed. The vehicle is designed to float and move on the water, and includes a hull, which is typically sealed. An above-water camera mount is attached to the hull and extends upwardly from it. The above-water camera mount carries one or more cameras. A below-water camera mount is attached to the hull and extends downwardly from it. The below-water camera mount also carries one or more cameras. A first propulsion system is adapted to drive the vehicle through water, and a first steering system is associated with the first propulsion system. The observation vehicle also includes communication and control systems. The vehicle may be fore-aft symmetrical, with a propulsion system and a steering system disposed proximate to each end of the hull. Also disclosed is a system including a vehicle with an associated controller and a data review station.