Abstract:
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.
Abstract:
The present invention discloses an inside mobile ballast arrangement for sailboats, said arrangement using a dense material and being preferably in a watertight/gas-tight compartment, the whole system on low friction bearings and being close to the bottom of the hull, this arrangement being able to move longitudinally from front to rear and vice versa, along the X axis, independently or simultaneously with a perpendicular displacement, i.e. from port to starboard and vice versa, along the Y axis.
Abstract:
The present invention is a device mounted on a watercraft that creates a method of systematic weight distribution, which modifies a vessel's wake as it travels through water. The device uses systematically moveable ballast object(s) that are supported in a variety of positions along a specified path. As a ballast object is selectively moved towards a specific extremity of a watercraft, it causes that side or end to sink deeper in the water, and raises the opposing side or end, thus controlling or influencing the vessel's relative position on a body of water. When the watercraft is operating at higher speeds, the invention's ability to control the vessels' position allows an operator to selectively control the shape, size and slope of the watercraft's wake, as referenced in the disclosed method.
Abstract:
Depth triggers for marine geophysical survey cable retriever systems. At least some of the illustrative embodiments are methods including causing a submerged geophysical survey cable to surface. The cause may include: moving a piston within a cylinder of a housing coupled to the geophysical survey cable, the moving of the piston responsive to pressure exerted on a face of the piston as the geophysical survey cable reaches or exceeds a predetermined depth, wherein the movement of the piston overcomes a force created by interaction between two materials, the force latches the piston in place at depths above the predetermined depth; and responsive to the piston overcoming the force that latches the piston deploying a mechanism that makes the geophysical survey cable more positively buoyant, the deploying responsive to movement of the piston.
Abstract:
The present invention discloses a gravity center adjustment device for a wind turbine installation vessel, with the gravity center adjustment device (2) fixedly mounted to the outside of the vessel body (4) of the wind turbine installation vessel. The existence of the gravity center adjustment device (2) according to the present invention is independent from the vessel body and no longer limited by the size of the installation vessel and the size of the ballast bank provided in the vessel body of the wind turbine installation vessel. The size of the gravity center adjustment device (2) may be set as desired so that the adjustment ability of the gravity center adjustment device can be changed, whereby its ability for adjusting gravity center of the wind turbine installation vessel can be improved and the stability of the wind turbine installation vessel can be improved. Therefore, the wind turbine installation vessel can operate in an environment of poor weather condition, so that the operation efficiency can be improved and the cost of constructing a wind power plant on the offshore can be reduced. The present invention also discloses a wind turbine installation vessel including the above-mentioned gravity center adjustment device (2).
Abstract:
A sailboat, which include an extendable keel having a moveable inner member positioned within a fixed keel and a control system for lowering or retracting the inner member.
Abstract:
A ballast system for a sailing boat includes an elongate body having a first end and a second end. A mounting is provided at the first end of the elongate body for suspending the elongate body from a hull of a sailing boat. A ballast weight is positioned at the second end of the elongate body. A motor and gear assembly are provided for moving the second end of the elongate body relative to the hull of the sailing boat. The described ballast system decreases the amount of ballast weight required without sacrificing the safety of operation of the sail boat. The decrease in ballast weight, decreases the over all displacement of the sail boat, and permits increased speed.
Abstract:
A sailing yacht, in addition to its ballast keel (2), has at least one winged keel ( ) which optionally also carries ballast. Both ballast keel (2) and winged keel (1) are mounted to swivel on the hull of the sail ship around an axis aligned essentially in the longitudinal direction of the sail ship. Thus, by swivelling ballast keel (2) the righting moment is changed, for example, increased. By swivelling winged keel (1) its lateral plane part can be changed and thus can be kept large even when the sailing yacht is heeling.
Abstract:
A nautical balance system for installation on small sailboats. The system improves the ability of a helmsman to counter the heeling force of the wind on the sails by providing a swinging seat supported by semicircular rail for supporting the weight of the helmsman outboard of the sailboat. The system enables the helmsman to easily use his weight to limit the heel of the sailboat. The system is independent of mast location and provides for tacking under a low boom.
Abstract:
A sailboat without stays for the mast has automatic ballasting which uses a tilting main mast and a tilting pole that has weights traveling up it to counteract increasing wind force upon the sail. The mast and the pole tilt in opposite directions. Their angles are prescribed by a set of gears acting as a motion reversing means, so that as the wind force increases the tilt of the mast, the tops of the mast and pole separate. The weights move up the pole and away from the sailboat's centerline because they are attached to a line fixed to the top of the mast and directed down the pole by a pulley at the pole top. Therefore, as the mast and pole separate, the length of line hanging down the pole is shortened and the weights move up the tilted pole.