An apparatus. The apparatus includes a body and a plurality of control surfaces attached to the body. A first control surface is configured to control an ascent and descent of the apparatus, responsive to ascent/descent control information. A second control surface is configured to control a roll of the apparatus responsive to roll control information, and a third control surface is configured to control a yaw of the apparatus responsive to yaw control information. The apparatus further includes a releasable first docking fixture attached to the body, the first docking fixture configured to engage a second docking fixture on a payload.

A subsurface battery system includes a ballast mass at the seafloor, a deep-sea electronics module, having an interface to seafloor payloads, and a subsurface buoyant pressure vessel having a battery. The ballast mass is attached to the deep-sea electronics module. The deep-sea electronics module is connected to the battery. The subsurface buoyant pressure vessel is submerged to a water depth of approximately 50 meters to 500 meters. The system is used for powering the seafloor payloads.

An object that can be towed in a fluid by a cable along a substantially horizontal transport axis comprises a body suspended under gravity from the cable by a fixing arm, and an exterior hydrodynamic surface that is symmetric with respect to a vertical plane containing the transport axis, so as to limit the lateral lift of the body, and an opening passing through the body along a vertical axis and configured to equalize the pressures of fluid flowing along the exterior surface, making it possible to limit the hydrodynamic forces that may be generated perpendicular to the transport axis giving rise to a force in rotation about the transport axis opposing the effect of gravity.

An unmanned vessel system can include a hull system configured to provide buoyancy, one or more seismic sources configured to generate seismic energy, and a deployment apparatus configured to deploy the seismic sources from the hull system to a water body or water column. A control system can be configured to operate the deployment apparatus, in order to deploy the one or more seismic sources so that the seismic energy propagates through the water column. A compressed air source can be provided on board the unmanned vessel system, with a source line configured to provide compressed air to the seismic sources.

An autonomous underwater vehicle (AUV) for guiding other AUVs during a marine seismic survey. The guiding AUV includes a housing; a propulsion system located inside the housing; and an acoustic positioning system attached to an outside the housing. The acoustic positioning system emits at least three chirps from three different locations.

Systems and methods for attenuating vibrations in marine seismic equipment involve a vessel towing a seismic streamer having a plurality of seismic receivers. The seismic streamer is connected to the vessel by a front-end and a damper is coupled to the front-end. A vibration on the front-end is detected and a damper response to the detected vibration on the front-end is then determined. The damper is actively adjusted based on the damper response. The active adjustment dampens vibrations in an axial direction along a lead-in of the front-end and/or vibrations in a direction transverse to an axial direction of the lead-in.

A floating buoy includes a buoy hull having a tower that extends outwardly from the hull. A plurality of sensors are mounted either on the buoy hull, within the buoy hull, and/or on the tower. The plurality of sensors includes at least one met-ocean sensor, at least one ecological sensor, and at least one wind speed measurement sensor. The floating buoy further includes an autonomous power system that is configured to provide electrical power to each of the plurality of sensors. The wind speed measurement sensor may be a Light Detection and Ranging (LiDAR) wind speed measurement sensor, a surface level wind speed sensor, an ultrasonic wind speed sensor, or SODAR.

Embodiments described herein relate to generating an image of an acoustic field associated with an underwater region. A plurality of submersible sensing devices (SSDs) are disposed so as to be substantially separate from each other in an underwater region, wherein each respective SSD is configured to execute a sink/float mission. During at least a portion of the sink/float mission, within each SSD, an environmental sensor measures at least one environmental parameter, a position sensor detects position information, an acoustic detection sensor detects at least one underwater signal, and a data recording system records mission data. After the sink/float mission, a processor receives mission data from the SSDs and generates an acoustic field image. Advantageously, during the sink/float mission some SSDs can transmit an orthogonal high time-bandwidth signal to help prevent interference between SSD during acoustic detection.

An underwater observation apparatus includes an observation apparatus body, a weight structure, a coupling device, and a fusion cutting device. The observation apparatus body is configured to house at least a power source, a communication circuit for a communication device, and a signal processing device. The coupling device couples the observation apparatus body with the weight structure via a remote-controlled release structure capable of releasing the observation apparatus body from the weight structure. The underwater observation apparatus also includes a power feeding coil located inside of a glass sphere to generate magnetic flux, and a power receiving coil located outside of the glass sphere. The power receiving coil generates an induced voltage when interlinked by the magnetic flux generated by the power feeding coil. The power receiving coil is configured to supply drive power to the fusion cutting device.

Paravane for floating barrier A paravane (20) including at least one foil with a first side, a second side, a leading end, a trailing end, a top and a bottom, wherein at least one foil is straight (1) and at least one second foil is curved (2), where one side of the straight foil and the other side of the curving foil are interconnected by a number of stays (3), where at least one foil is connected at the top to at least a first buoyant body (10) and that at least the one plane at the bottom is connected to at least one ballast element (13), and that at the second side of the straight foil there are at least one towline (8) and a tow eye (9) by which there is achieved a paravane (20) that can keep an arrangement of lines, nets, floats in a water body in a position suitable for performing the task.