An anchor assembly for discerning if an anchor has securely engaged with the seabed, having a float with a length of line below no more than twice the distance from the water's surface to the seabed. The float includes a redirection element that allows the line to support a ballast weight via a descending portion of the line and an ascending portion that is secured to an anchor. The volume of the float and ballast weight are selected such that the float remains visibly buoyant when the anchor is stationary, yet becomes wholly or partially submerged when the anchor is in motion with respect to the seabed surface.

The present invention provides for a method of marine construction. Said marine construction is based on an external perimeter and inner area and comprises seabed lying elements and floating elements. The marine construction of the present invention comprising fixed elements that are placed on the defined perimeter of said marine construction. Said fixed elements are lying on the seabed. And further comprising floating elements that are placed in the inner area the marine construction, defined by said external perimeter. The marine construction is capable of being deployed at a variety of distances from shore, at a differential nature of sea bed, and to be able to carry out different tasks and destinations, such as but not limited to airport, residency, army base, power station, port, marina, other infrastructures, etc. and any combination thereof.

The present invention provides for a method of marine construction. Said marine construction is based on an external perimeter and inner area and comprises seabed lying elements and floating elements. The marine construction of the present invention comprising fixed elements that are placed on the defined perimeter of said marine construction. Said fixed elements are lying on the seabed. And further comprising floating elements that are placed in the inner area the marine construction, defined by said external perimeter. The marine construction is capable of being deployed at a variety of distances from shore, at a differential nature of sea bed, and to be able to carry out different tasks and destinations, such as but not limited to airport, residency, army base, power station, port, marina, other infrastructures, etc. and any combination thereof.

A hydraulic piston spud pole for anchoring a vessel may comprise an elongate sleeve having a top, a hydraulic inlet, and a bottom terminating in a bottom aperture, a portion of the elongate sleeve being formed to contain a hydraulic column; a spud pole having a piston vertically-movably seated within the elongate sleeve; and a pump assembly connected to the hydraulic inlet that is preferably activated by a controller to lift or drop the spud pole. The elongate sleeve may comprise a vertically-extending inner surface and a sleeve bearing, and the spud pole may comprise a vertically-extending outer surface configured to fit closely against the sleeve bearing while the piston fits closely against the elongate sleeve’s vertically-extending inner surface. The hydraulic column may be defined between the vertically-extending outer surface of the spud pole, the vertically-extending inner surface of the elongate sleeve, the piston, and the sleeve bearing.

A hydraulic piston spud pole for anchoring a vessel may comprise an elongate sleeve having a top, a hydraulic inlet, and a bottom terminating in a bottom aperture, a portion of the elongate sleeve being formed to contain a hydraulic column; a spud pole having a piston vertically-movably seated within the elongate sleeve; and a pump assembly connected to the hydraulic inlet that is preferably activated by a controller to lift or drop the spud pole. The elongate sleeve may comprise a vertically-extending inner surface and a sleeve bearing, and the spud pole may comprise a vertically-extending outer surface configured to fit closely against the sleeve bearing while the piston fits closely against the elongate sleeve’s vertically-extending inner surface. The hydraulic column may be defined between the vertically-extending outer surface of the spud pole, the vertically-extending inner surface of the elongate sleeve, the piston, and the sleeve bearing.

An anchor installation vehicle that includes a vehicle frame having a top end and bottom end, one or more rotational thrusters, and an anchor system configured to hold an anchor extending from the bottom end of the vehicle frame.

An anchor installation vehicle that includes a vehicle frame having a top end and bottom end, one or more rotational thrusters, and an anchor system configured to hold an anchor extending from the bottom end of the vehicle frame.

A marine survey node can include a body to be deployed to a seabed, a marine survey receiver coupled to the body and to acquire marine survey data, and a soil sample module associated with the body to collect a soil sample from the seabed. A soil sample module can include a vessel, a first valve coupled to the vessel, and a spike coupled to the vessel. The spike can penetrate an earth surface. The first valve can maintain a pressure difference between the vessel and the spike when closed and equalize a pressure between the vessel and the spike when open. An inlet in the spike can equalize pressure between an inside of the spike and an outside of the spike and to collect a soil sample from the earth surface.

A marine survey node can include a body to be deployed to a seabed, a marine survey receiver coupled to the body and to acquire marine survey data, and a soil sample module associated with the body to collect a soil sample from the seabed. A soil sample module can include a vessel, a first valve coupled to the vessel, and a spike coupled to the vessel. The spike can penetrate an earth surface. The first valve can maintain a pressure difference between the vessel and the spike when closed and equalize a pressure between the vessel and the spike when open. An inlet in the spike can equalize pressure between an inside of the spike and an outside of the spike and to collect a soil sample from the earth surface.

The invention relates to an elongate fixation device (1) for use in subsea anchoring, and a method for installation. The device (1) has a triple nested stem arrangement, the innermost stem (2) of which has a cutter (9) disposed at a distal end and a tapered section (8) located adjacent to and proximally behind the cutter (9). An intermediate stem (3) surrounds at least a central portion of the inner stem (2) and has one or more flareable cutting fingers (7) at its distal end. An outer stem (4) surrounds a proximal portion of the intermediate stem (3). The inner (2) and intermediate (3) stems are coupled by a first releasable coupling (17) which when released allows relative axial motion along a first distance. The outer and intermediate stems are coupled by a second releasable coupling (18) which when released allows relative axial motion along a second distance. The intermediate stem 3 is nested within the outer stem (4), in some cases for at least a majority of the outer stem (4). In some examples, the outer stem (4) has a rotationally driveable portion 10 and the inner stem 2 has a tensioning nut (12) for adjusting the relative axial positions of the inner (2) and outer 4 stems. The tensioning nut (12) and the driveable portion (10) are coupleable to a single rotational drive (23). The invention also relates a method for installation and to installation apparatus (21).