A non-metallic clip connection system includes a non-metallic clip having a substantially rectangular base portion, a first longitudinal flared wing portion, and a second longitudinal flared wing portion, wherein a plurality of edges of the clip along a path of insertion are beveled or radiused. The non-metallic clip connection system also includes a first non-metallic member having a first portion of a non-metallic clip receiver and a second non-metallic member having a second portion of the non-metallic clip receiver. The first non-metallic member is secured to the second non-metallic member by inserting the non-metallic clip in the non-metallic clip receiver. A non-metallic vertebrae bend restrictor and a non-metallic vertebrae end piece may use a non-metallic clip connection system.

A mooring buoy (100) for a vessel (402) comprises a floating body (102) and at least one anchoring line (108, 110, 112) connected between the floating body and the sea floor (200). At least one mooring line (126) and electric cable (118) are arranged to be coupled between the mooring buoy and the vessel. At least one mooring buoy circuit switch (508) is electrically connected to the at least one electric cable and configured to deenergise power to the at least one electric cable. A controller (500) has a processing unit and is arranged to selectively control the at least one mooring buoy circuit switch. The controller is configured to actuate the mooring buoy circuit switch in response to a received condition signal from at least one sensor and deenergise the at least one electric cable.

A mooring buoy (100) for a vessel (402) comprises a floating body (102) and at least one anchoring line (108, 110, 112) connected between the floating body and the sea floor (200). At least one mooring line (126) and electric cable (118) are arranged to be coupled between the mooring buoy and the vessel. At least one mooring buoy circuit switch (508) is electrically connected to the at least one electric cable and configured to deenergise power to the at least one electric cable. A controller (500) has a processing unit and is arranged to selectively control the at least one mooring buoy circuit switch. The controller is configured to actuate the mooring buoy circuit switch in response to a received condition signal from at least one sensor and deenergise the at least one electric cable.

Termination assembly for three-phase high voltage submarine cable(s) (1a-c), has an open enclosure (10) with at least two cable lead-in (3a-c) located at one end (16) of the enclosure, at least six termination units (21-29) within the enclosure for receiving three phase conductors per cable, respectively.

An underwater utility line, and associated systems and methods are disclosed. The underwater utility line can include an adjustably buoyant tube. The underwater utility line can also include a transmission line to transfer energy disposed in an interior of the adjustably buoyant tube. The underwater utility line can further include a gas source and a controller to control the gas provided by the gas source to alter the buoyancy of the adjustably buoyant tube.

A non-metallic clip connection system includes a non-metallic clip having a substantially rectangular base portion, a first longitudinal flared wing portion, and a second longitudinal flared wing portion, wherein a plurality of edges of the clip along a path of insertion are beveled or radiused. The non-metallic clip connection system also includes a first non-metallic member having a first portion of a non-metallic clip receiver and a second non-metallic member having a second portion of the non-metallic clip receiver. The first non-metallic member is secured to the second non-metallic member by inserting the non-metallic clip in the non-metallic clip receiver. A non-metallic vertebrae bend restrictor and a non-metallic vertebrae end piece may use a non-metallic clip connection system.

A non-metallic clip connection system includes a non-metallic clip having a substantially rectangular base portion, a first longitudinal flared wing portion, and a second longitudinal flared wing portion, wherein a plurality of edges of the clip along a path of insertion are beveled or radiused. The non-metallic clip connection system also includes a first non-metallic member having a first portion of a non-metallic clip receiver and a second non-metallic member having a second portion of the non-metallic clip receiver. The first non-metallic member is secured to the second non-metallic member by inserting the non-metallic clip in the non-metallic clip receiver. A non-metallic vertebrae bend restrictor and a non-metallic vertebrae end piece may use a non-metallic clip connection system.

A submarine power cable system including: a dynamic submarine power cable having an element with a first axial section and a second axial section which are joined at a joint location; and a bend restriction device arranged around the dynamic submarine power cable, wherein the bend restriction device extends axially over the joint location, and wherein the bend restriction device is arranged to restrict bending of the dynamic submarine power cable at the joint location.

A submarine power cable system including: a dynamic submarine power cable having an element with a first axial section and a second axial section which are joined at a joint location; and a bend restriction device arranged around the dynamic submarine power cable, wherein the bend restriction device extends axially over the joint location, and wherein the bend restriction device is arranged to restrict bending of the dynamic submarine power cable at the joint location.

A method of installing a subsea cable bundle including an umbilical and at least one direct current and fibre optic (DCFO) cable attached to an outside of the umbilical includes connecting a first end of the cable bundle to a pulling head, lowering the first end of the cable bundle into the se, connecting the pulling head to a winch cable of a winch (the winch may be connected before or after lowering the first end), the winch being located on a platform and the winch cable extending from the platform into the sea through a J-tube, and using the winch to pull the first end of the cable bundle up to the platform through the J-tube. The method further includes laying the cable bundle on the seafloor, and at a target location, at or close to a subsea structure, detaching the DFCO cable from the umbilical and connecting the DCFO cable and the umbilical at their second ends to the subsea structure.