Disclosed herein is a floating recovery device for underwater equipment. The device includes a recovery body partitioned into a first compartment, a second compartment, and a third compartment by a partition wall, first and second pressure tanks installed in the first and second compartments, respectively, first and second striking parts fastened to the first and second pressure tanks, respectively, to strike the first and second pressure tanks, first and second actuators wirelessly actuating the first and second striking parts, respectively, and a buoyancy generator installed in the third compartment, and inflated by high-pressure gas introduced from the first and second pressure tanks, thus generating buoyancy. Such a configuration allows the pressure tank to be wirelessly struck for the purpose of supplying high-pressure gas to the buoyancy generator and floating the underwater equipment in the event of the loss of the underwater equipment.

Embodiments of the present apparatus and method feature a permanently fixed canted keel. The apparatus and method feature tacking maneuvers which shift the sail element and reverse the direction of the hull form.

Disclosed herein is a floating recovery device for underwater equipment. The device includes a recovery body partitioned into a first compartment, a second compartment, and a third compartment by a partition wall, first and second pressure tanks installed in the first and second compartments, respectively, first and second striking parts fastened to the first and second pressure tanks, respectively, to strike the first and second pressure tanks, first and second actuators wirelessly actuating the first and second striking parts, respectively, and a buoyancy generator installed in the third compartment, and inflated by high-pressure gas introduced from the first and second pressure tanks, thus generating buoyancy. Such a configuration allows the pressure tank to be wirelessly struck for the purpose of supplying high-pressure gas to the buoyancy generator and floating the underwater equipment in the event of the loss of the underwater equipment.

Systems for real-time wave monitoring, which provide real-time updates of wave conditions to users who wish to access the beach for leisure or sporting activities, are described. One example system includes a plurality of buoys and a transceiver. Each of the plurality of buoys includes a sensor array configured to continuously monitor one or more characteristics of the wave conditions, and the transceiver is configured to transmit, to a remote server, information corresponding to the one or more characteristics of the wave conditions over a wireless communication channel. The information from each of the plurality of buoys is combined with a user preference to provide a user with a message regarding the wave conditions in response to a user request, and a duration between the user request and transmission of the information from each of the plurality of buoys is less than a predetermined value.

A mobile, wave motion-isolated, waterborne device having a platform with a plurality of support members extending beneath the platform configured to receive an articulated joint. The device further includes a plurality of corresponding clusters of spar buoys, wherein each spar buoy has an articulated joint at a first end of the spar buoy and a ballast operably configured at the second end. The articulated joint of each spar buoy within the cluster corresponds to a swivel footing configured to receive an articulated joint. The swivel footing itself includes an articulating joint. Each articulated joint of the swivel footing corresponds to one of the support members of the platform. The cluster of spar buoys can optionally move between a vertical orientation and a horizontal orientation. An optional movable ballast may be used in place of a stationary ballast. The invention also includes optional thrust/propulsion, steering, and damping features.

A collar assembly for a watercraft includes an elongate tubular casing with a lengthwise sealable opening. A foam core is removably positioned in the tubular casing, and includes a body portion and a plurality of circumferentially spaced foam springs that extend outwardly to engage the tubular casing, to bias the foam core towards a center position in the tubular casing. In some embodiments a body portion of the foam core has a circular cross section, and the foam springs are co-formed with the body portion. In some embodiments the foam core comprises a plurality of longitudinal sections that are enclosed in a membrane having an inflation valve that extends through the tubular casing.

Provided is an amphibious vehicle capable of maintaining stable vehicle posture by pitching control during cruising on water and also reducing wave drag caused by waves on water. The amphibious vehicle according to the present invention is characterized by being provided with: a vehicle body (11) capable of moving on sea and land; a front flap (14A) with one end portion secured to a lower end portion of the vehicle body (11) in such a manner that a principal surface is inclined with respect to a front surface (11a) of the vehicle body (11); and a rear flap (14B) with one end portion secured to a lower end portion of a rear surface (11b) of the vehicle body (11).

A mobile, wave motion-isolated, waterborne device having a platform with a plurality of support members extending beneath the platform configured to receive an articulated joint. The device further includes a plurality of corresponding clusters of spar buoys, wherein each spar buoy has an articulated joint at a first end of the spar buoy and a ballast operably configured at the second end. The articulated joint of each spar buoy within the cluster corresponds to a swivel footing configured to receive an articulated joint. The swivel footing itself includes an articulating joint. Each articulated joint of the swivel footing corresponds to one of the support members of the platform. The cluster of spar buoys can optionally move between a vertical orientation and a horizontal orientation. An optional movable ballast may be used in place of a stationary ballast. The invention also includes optional thrust/propulsion, steering, and damping features.

A collar assembly for a watercraft includes an elongate tubular casing with a lengthwise sealable opening. A foam core is removably positioned in the tubular casing, and includes a body portion and a plurality of circumferentially spaced foam springs that extend outwardly to engage the tubular casing, to bias the foam core towards a center position in the tubular casing. In some embodiments a body portion of the foam core has a circular cross section, and the foam springs are co-formed with the body portion. In some embodiments the foam core comprises a plurality of longitudinal sections that are enclosed in a membrane having an inflation valve that extends through the tubular casing.

A semi-submersible offshore platform for operations in a body of water includes a buoyant hull configured to be at least partially submerged in the water. In addition, the platform includes an equipment deck coupled to the hull and configured to be positioned above the water. The hull includes a first vertical column and a second vertical column horizontally spaced from the first vertical column. Each column has a longitudinal axis, an upper end, a lower end, and a tapered section axially positioned between the upper end and the lower end. Further, the hull includes a horizontal pontoon having a longitudinal axis, a first end coupled to the lower end of the first column, and a second end coupled to the lower end of the second column.