A submergible umbrella stand includes a body including a top, a bottom spaced from the top, and a body wall extending between the top and the bottom and defining a body cavity therein. At least one filling aperture is formed in the top. An umbrella sleeve is positioned within the body and is configured to receive an umbrella pole. An upper recess is formed in the top and includes an upper recess sidewall extending inwardly and downwardly from the top of the body into the body cavity and a bottom extending inwardly from a bottom of the upper recess sidewall. A first sleeve aperture is formed in the bottom of the upper recess, with the umbrella sleeve extending through the first sleeve aperture.

A submergible umbrella stand includes a body including a top, a bottom spaced from the top, and a body wall extending between the top and the bottom and defining a body cavity therein. At least one filling aperture is formed in the top. An umbrella sleeve is positioned within the body and is configured to receive an umbrella pole. An upper recess is formed in the top and includes an upper recess sidewall extending inwardly and downwardly from the top of the body into the body cavity and a bottom extending inwardly from a bottom of the upper recess sidewall. A first sleeve aperture is formed in the bottom of the upper recess, with the umbrella sleeve extending through the first sleeve aperture.

A multi-tank/vessel buoyancy system for use in deploying and connecting tendons or other elongate members between subsea anchors and floating/semi-submersible platforms. The vessels are interconnected at axially spaced locations toward their upper ends and lower ends, there being an equalizing system proximate the top ends of the vessels to permit ingress and egress of air into the vessels and a lower water equalizing system to permit free-flowing ingress and egress of water into the vessels. There is at least one clamping system operatively connected to the multi-vessel system, the clamping system, like the valving systems, being remotely, acoustically operable from a PLC on a work barge or the like.

The gravity buoy includes a can float that is visible above the waterline and provides the buoyancy for the device. A pulley assembly permits a tether under constant tension to pass easily through a point near the bottom of the can float, thus creating a pull point. A tension weight provides the downward force that puts the tether under constant tension so that the can float maintains its location above the anchor, and helps keep the can float vertical in the water along with concrete ballast inside the bottom of the can float. An anchor provides the downward force that will keep the buoyancy of the can buoy and the weight of the tension weight from displacing the gravity buoy from its intended location. An inline weight provides downward force on the anchor-side of the tether.

The gravity buoy includes a can float that is visible above the waterline and provides the buoyancy for the device. A pulley assembly permits a tether under constant tension to pass easily through a point near the bottom of the can float, thus creating a pull point. A tension weight provides the downward force that puts the tether under constant tension so that the can float maintains its location above the anchor, and helps keep the can float vertical in the water along with concrete ballast inside the bottom of the can float. An anchor provides the downward force that will keep the buoyancy of the can buoy and the weight of the tension weight from displacing the gravity buoy from its intended location. An inline weight provides downward force on the anchor-side of the tether.

A variable buoyancy device has an inner region and an outer cavity. The outer cavity extends at least partially around the inner region and is adapted to contain fluids, such as a liquid and a gas, the relative proportions of which can be varied to vary buoyancy. The inner region provides an advantageous location for equipment, while the outer cavity provides a significant volume for achieving a wide range of buoyancy adjustments.

A variable buoyancy device has an inner region and an outer cavity. The outer cavity extends at least partially around the inner region and is adapted to contain fluids, such as a liquid and a gas, the relative proportions of which can be varied to vary buoyancy. The inner region provides an advantageous location for equipment, while the outer cavity provides a significant volume for achieving a wide range of buoyancy adjustments.

This invention is an apparatus that can be intermittently bottom moored and moved with buoyancy as it uses its sensors to collect data in deep ocean water. In one embodiment of the invention, the apparatus includes one or more floats, buoyancy engines, payload sensors, depth sensors and electronics. The electronics provide the power and, among other things, control the transmission of data from and the reception of information by the apparatus. An anchor is used to moor the apparatus at desired locations. When not moored, the apparatus drifts with the currents at the depth at which the apparatus is then positioned, with the movement being directed by current flow of the water. The movement of the apparatus is guided with knowledge of the currents and tides (it is not random).

This invention is an apparatus that can be intermittently bottom moored and moved with buoyancy as it uses its sensors to collect data in deep ocean water. In one embodiment of the invention, the apparatus includes one or more floats, buoyancy engines, payload sensors, depth sensors and electronics. The electronics provide the power and, among other things, control the transmission of data from and the reception of information by the apparatus. An anchor is used to moor the apparatus at desired locations. When not moored, the apparatus drifts with the currents at the depth at which the apparatus is then positioned, with the movement being directed by current flow of the water. The movement of the apparatus is guided with knowledge of the currents and tides (it is not random).

The present disclosure relates to a stand-alone buoy with a seawater battery, which includes a main body formed to have a predetermined buoyancy so as to float on seawater and provided with a seawater space therein and an inlet formed to introduce the seawater into the seawater space, a position notification part installed on the main body and configured to notify a user of a position of the main body, a solar cell part installed on the main body and configured to generate electricity using sunlight, and a seawater battery unit installed in the seawater space to be submerged in the seawater introduced into the seawater space and configured to react with the seawater to store the electricity provided from the solar cell part and to provide the stored electricity to the position notification part so as to operate the position notification part.