Abstract: A tool for cleaning subsea structures, the tool comprising a frame comprising a stationary frame portion; and a rotating frame portion rotationally connected to the stationary frame portion; and at least one cleaning device attached to the rotating frame portion.

Abstract: A system comprising a structure defining an interior of the system; an apparatus exterior to the structure, the apparatus adapted to reduce in size when lowered into a body of water; a strap exterior to the apparatus, the strap adapted to reduce in size as the apparatus reduces in size.

Abstract: A system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.

Abstract: There is disclosed a current tank system comprising a first current tank adapted to produce a first current in a first direction, and a second current tank adapted to produce a second current in a second direction. There is also disclosed a method of testing a sample, comprising exposing the sample to a first current in a first current tank, and exposing the sample to a second current in a second current tank.

Abstract: A system comprising a subsea structure beneath a body of water, subject to a water current; an installation vessel floating on the body of water; a line connected to the subsea structure and the installation vessel; and one or more vortex induced vibration suppression devices connected to the line, which have been lowered from the vessel to be installed on the subsea structure.

Abstract: There is disclosed a system comprising a vessel floating in a body of water, a line comprising a first portion connected to the vessel and a second portion in the body of water, a tool connected to the second portion of the line, the tool in the body of water below the vessel, a stationary apparatus connected to the second portion of the line, the stationary apparatus in the body of water below the vessel, and a mechanism on the vessel connected to the first portion of the line, the mechanism adapted to keep the line taut as the vessel heaves up and down.

Abstract: There is disclosed a current tank system comprising a first current tank adapted to produce a first current in a first direction; a second current tank adapted to rotate to produce a second current in a second direction; a sample adapted to be exposed to the first current and the second current.

Abstract: There is disclosed a system comprising a structural element; at least one strake holder connected to the structural element; and at least one flexible helical strake connected to the at least one strake holder.

Abstract: There is disclosed a system comprising a structural element, at least one helical strake about the structural element, and at least one ramp to provide a transition from the structural element to the helical strake.

Abstract: There is disclosed a current tank system comprising a first current tank adapted to produce a first current in a first direction; a second current tank adapted to rotate to produce a second current in a second direction; a sample adapted to be exposed to the first current and the second current.