Abstract: A system for dredging a seabed includes a trailing suction hopper dredger. The trailing suction hopper dredger includes a hull, a rail coupled to the hull, and a dredge arm coupled to the rail. The dredge arm includes an upper suction pipe coupled to a lower suction pipe. A pump is coupled to the upper suction pipe and is configured to draw material toward the upper suction pipe from the seabed. A visual marine life deterrent is coupled to the dredge arm and is configured to direct light toward the sea floor where marine life may be located. Another visual marine life deterrent includes a silhouette of a marine life predator. The visual marine life deterrents are configured to be observable by the marine life and cause marine life to move away from the dredge arm.

Abstract: An articulated tug barge hopper dredge including a tug, a barge, and a coupling system configured to interconnect the tug and the barge. The tug has a bow and the barge has a notch in a periphery of the barge. The notch is sized to receive the bow of the tug. The articulated tug barge hopper dredge further includes dredging machinery integrated with the barge and configured to excavate material dredged from the seabed. The dredging machinery includes trailing suction pipes.

Abstract: A mooring buoy assembly includes a floating structure, a pipe, an elbow, and a swivel joint. The pipe extends vertically into and away from the floating structure, and is fixed to the floating structure such that the floating structure does not rotate with respect to the pipe. Furthermore, the pipe is configured to provide a flow path in fluid communication with a submerged hose. The elbow is in fluid communication with the pipe and provides a change in direction of the flow path. Furthermore, the elbow is supported by the floating structure and is configured to be in fluid communication with a floating hose. The swivel joint is connected to the pipe and is configured to allow the elbow and floating hose to rotate relative to the submerged hose.

Abstract: A mooring buoy assembly includes a floating structure, a pipe, an elbow, and a swivel joint. The pipe extends vertically into and away from the floating structure, and is fixed to the floating structure such that the floating structure does not rotate with respect to the pipe. Furthermore, the pipe is configured to provide a flow path in fluid communication with a submerged hose. The elbow is in fluid communication with the pipe and provides a change in direction of the flow path. Furthermore, the elbow is supported by the floating structure and is configured to be in fluid communication with a floating hose. The swivel joint is connected to the pipe and is configured to allow the elbow and floating hose to rotate relative to the submerged hose.

Abstract: An articulated tug barge hopper dredge including a tug, a barge, and a coupling system configured to interconnect the tug and the barge. The tug has a bow and the barge has a notch in a periphery of the barge. The notch is sized to receive the bow of the tug. The articulated tug barge hopper dredge further includes dredging machinery integrated with the barge and configured to excavate material dredged from the seabed. The dredging machinery includes trailing suction pipes.