The generation of electronic notifications relating to ocean waves. Embodiments include frameworks and methodologies configured to enable real-time location-specific determination of recreationally relevant wave characteristic data, including (bot not limited to) generation and delivery of location-specific ocean wave notifications. Embodiments include, by way of example, technology for providing real-time location-specific determination of recreationally relevant wave characteristic data, portable and/or wearable devices configured to deliver notifications in respect of approaching waves, wave monitoring devices and frameworks configured to enable generation of alert notifications for surfers, rock fishers and other recreational users, and generation and delivery of location-specific ocean wave data, including visual data for event broadcasts.

A wake test instrumentation and more particularly, systems and methods for determining wake velocities and directions are provided. The wake test instrument includes a linkage system mounted to a base and a pole pivotally mounted to the linkage system and which comprises a hydrofoil system. The wake test instrument further includes a hydrofoil system mounted to the pole. The wake test instrument further includes a water flow meter mounted to the pole which is structured to measure wake parameters.

A system and a method for determining one or more wave characteristics from a moving platform are disclosed. A sonar system, such as an Acoustic Doppler Current Profiler, can profile the water motion relative to the platform, and an earth reference can determine a measure of the platform motion relative to a fixed earth reference. Both water profile and earth reference measurements can be synergistically employed to compensate for motion of the platform. Directional wave spectra and non-directional wave spectrum can be computed and translated via linear wave theory to surface height spectra and used to calculate characteristics, such as significant wave height, peak period, and peak direction.

A method of modelling a water current in a geological gridded model of a sedimentary area is disclosed, the model comprising a plurality of cells wherein each cell is assigned a water depth, the method comprising determining a direction and an energy of a water current in each cell of the model, wherein each water current is decomposed into a plurality of sub-currents corresponding to respective water depths, comprising at least:—a plume current, located at water surface, and—a bottom current, located at water bottom, the determination of a direction of a water current comprising determining a single direction common to each sub-current into which the water current is decomposed, and the determination of an energy of a water current comprising: —computing the energy of the plume current, and inferring, from the energy of the plume current, the energy of any other sub-current.

Systems and methods are provided for identification and tracking of large semi-closed eddies (e.g., oceanic eddies). For example, embodiments of the present disclosure provide systems and methods for detecting a cyclonic or anticyclonic eddy in the ocean and determining its size, shape, and intensity given a single input field. In an embodiment, this input is a two-dimensional (2D) gridded field of Sea Surface Height Anomaly (SSHA) or Absolute Dynamic Topography (ADT), both of which can be determined from satellite based observations. Embodiments of the present disclosure are more accurate and computationally efficient than traditional methods and further provide high adaptability that will enable additional improvements as advances are made in satellite-based observations.

Acoustic Doppler current Profile (ADP) data may be collected by floating vessels down a section of a river. The ADP data may be merged with LIDAR data or other image data. The data may be processed to determine river attributes, such as flow velocity for a specific river level (flow volume). River attributes may also include depth, water clarity, temperature, and/or other river attributes. Capture of ADP data at different river levels may be interpolated between measures to estimate river attributes at multiple river levels that are different from the river levels associated with the collected ADP data. The processed data may be used to assess drift of particles/objects through a section of the river and/or identify conforming habitat in the section of the river based at least in part on parameters of the habitat, among other possible uses of the processed data.

Systems and methods for sea state prediction and autonomous navigation in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes a method of predicting a future sea state including generating a sequence of at least two 3D images of a sea surface using at least two image sensors, detecting peaks and troughs in the 3D images using a processor, identifying at least one wavefront in each 3D image based upon the detected peaks and troughs using the processor, characterizing at least one propagating wave based upon the propagation of wavefronts detected in the sequence of 3D images using the processor, and predicting a future sea state using at least one propagating wave characterizing the propagation of wavefronts in the sequence of 3D images using the processor. Another embodiment includes a method of autonomous vessel navigation based upon a predicted sea state and target location.

A prediction portion predicts states including a water level of the wave at a prediction subject location. In a case in which inputs of the flow velocity in a line-of-sight direction of the wave at each observation location have been received, an estimation portion estimates states of waves including the water level thereof at the prediction subject location. The estimation of the states is based on a difference between the flow velocity in a line-of-sight direction of the wave at each input observation location, and the flow velocity in a line-of-sight direction of the wave at each input observation location obtained by converting states of the wave using an observation matrix. A determination portion causes the predictions of the states and the estimation of the states to be repeated until predetermined conditions have been satisfied.

The generation of electronic notifications relating to ocean waves. Embodiments include frameworks and methodologies configured to enable real-time location-specific determination of recreationally relevant wave characteristic data, including (but not limited to) generation and delivery of location-specific ocean wave notifications. Embodiments include, by way of example, technology for providing real-time location-specific determination of recreationally relevant wave characteristic data, portable and/or wearable devices configured to deliver notifications in respect of approaching waves, wave monitoring devices and frameworks configured to enable generation of alert notifications for surfers, rock fishers and other recreational users, and generation and delivery of location-specific ocean wave data, including visual data for event broadcasts.

Disclosed is a method and device suitable for detection of and warning against tsunamis. The device is located in the water at sea. The device includes a vessel, a sensor for measuring a physical quantity of the surrounding water, a control unit inside the vessel and operatively connected to the sensor, and a communication element including a transmitter for communicating with an external receiver that the predetermined condition relating to the physical quantity is fulfilled. The device further includes a ballast tank inside the vessel. The interior of the ballast tank is connected to the outside of the vessel. A pump pumps water from the ballast tank to outside the vessel. The overall density of the device exceeds the density of the surrounding water when the ballast tank is filled, and is less than the density of the surrounding water when the ballast tank is empty of water.