A mixed rope used for oceanographic buoy mooring system, comprises mixed core rope of metal and fiber and cover rope, wherein, the mixed core rope of metal and fiber comprises metal coil spring and fiber supporting core inside the metal coil spring; the cover rope is woven of several number of twisted strand; the mass content of the mixed core rope of metal and fiber is not greater than 20% of the mass of mixed rope, the mass content of the cover rope is not less than 80% of the mass of the mixed rope. Mixed rope used for oceanographic mooring system disclosed in present embodiments has small linear density and high fracture strength, may be used as data communication channel from under-water sensor to the over-water receiver, being soft, light and easy to deploy, the mixed rope can be used as the upper part of the oceanographic buoy mooring system with prospective application.

A system for power and data transmission in a body of water to unmanned underwater vehicles comprises a floating surface station for generating electric energy and receiving and transmitting data; an underwater station connectable to at least one unmanned underwater vehicle; at least one submerged depth buoy; and an umbilical, which comprises a power transmission line and a data transmission line, is mechanically and electrically connected to the surface station and to the underwater station, and is mechanically coupled to the depth buoy so that the umbilical comprises a first umbilical section that is stretched between the underwater station and the depth buoy and a second umbilical section that extends loose between the depth buoy and the surface station.

A system for power and data transmission in a body of water to unmanned underwater vehicles comprises a floating surface station for generating electric energy and receiving and transmitting data; an underwater station connectable to at least one unmanned underwater vehicle; at least one submerged depth buoy; and an umbilical, which comprises a power transmission line and a data transmission line, is mechanically and electrically connected to the surface station and to the underwater station, and is mechanically coupled to the depth buoy so that the umbilical comprises a first umbilical section that is stretched between the underwater station and the depth buoy and a second umbilical section that extends loose between the depth buoy and the surface station.

A portable basket is used to collect multiple weighted lines that extend between a buoy and a submerged crab pot. The basket is a cylindrical structure with flexible sidewalls that extend from the top edge to a bottom panel. Attached to the inside surface of the basket near the top edge are at least two ring connectors. During use, the basket is positioned below a winch system used to pull the weighted line and the crab pot out of the water. The weighted line's first connector is detached from the buoy and connected to a ring connector inside the basket. The winch is then activated to weighted line falls into the basket and automatically stacked in a vertical coil configuration inside the basket. When the crab pot is lifted out of the water, the second connector is detached from the crab pot and attached to the second ring connector near the top edge. The process may be repeated to collect additional weighted lines. When setting a crab pot, the buoy and pot connectors from one weighted line are detached from the ring connector and attached to desired buoy and pot, respectively. The buoy, the pot, and the coiled weighted line can then be deposited into the water.

A portable basket is used to collect multiple weighted lines that extend between a buoy and a submerged crab pot. The basket is a cylindrical structure with flexible sidewalls that extend from the top edge to a bottom panel. Attached to the inside surface of the basket near the top edge are at least two ring connectors. During use, the basket is positioned below a winch system used to pull the weighted line and the crab pot out of the water. The weighted line's first connector is detached from the buoy and connected to a ring connector inside the basket. The winch is then activated to weighted line falls into the basket and automatically stacked in a vertical coil configuration inside the basket. When the crab pot is lifted out of the water, the second connector is detached from the crab pot and attached to the second ring connector near the top edge. The process may be repeated to collect additional weighted lines. When setting a crab pot, the buoy and pot connectors from one weighted line are detached from the ring connector and attached to desired buoy and pot, respectively. The buoy, the pot, and the coiled weighted line can then be deposited into the water.

A dual-point absorber includes a first buoy, a second buoy, and a power take-off. The first buoy of the dual-point absorber is connected to a linkage. The second buoy of the dual-point absorber is capable of a movement relative to the first buoy. The power take-off is coupled to the first buoy and the second buoy. The linkage can be used to reduce a heave movement of the first buoy that is caused by waves.

A dual-point absorber includes a first buoy, a second buoy, and a power take-off. The first buoy of the dual-point absorber is connected to a linkage. The second buoy of the dual-point absorber is capable of a movement relative to the first buoy. The power take-off is coupled to the first buoy and the second buoy. The linkage can be used to reduce a heave movement of the first buoy that is caused by waves.

A mooring buoy for a vessel comprises a floating body comprising a first portion and a second portion, wherein the first portion is rotatable with respect to the second portion. At least one anchoring line is connected between the second portion and the sea floor. At least one electric cable is mounted on the first portion and connected to a power supply. The at least one electric cable has a free end connectable to an electric circuit of the vessel. At least one mooring line is connectable between the floating body and the vessel. The mooring buoy comprises a cable length adjustment mechanism configured to adjust the length of the at least one electric cable when the first portion rotates with respect to the second portion.

A mooring buoy for a vessel comprises a floating body comprising a first portion and a second portion, wherein the first portion is rotatable with respect to the second portion. At least one anchoring line is connected between the second portion and the sea floor. At least one electric cable is mounted on the first portion and connected to a power supply. The at least one electric cable has a free end connectable to an electric circuit of the vessel. At least one mooring line is connectable between the floating body and the vessel. The mooring buoy comprises a cable length adjustment mechanism configured to adjust the length of the at least one electric cable when the first portion rotates with respect to the second portion.

The invention relates to a buoy comprising a buoyant, plastic core component, and a plurality of detachable flotation components that support and surround the core component. The buoy is preferably more than 2.5 metres diameter, but the diameter of the core component is preferably less than or equal to 2.35 metres diameter. This facilitates transport in a single shipping container. A novel tie bar assembly and novel lifting/mooring mounts are also disclosed.