The traditional ROV winch is mounted on the lower part and suspended for cable laying. Due to the significant negative buoyancy of the cable winch itself, constantly activate the vertical thruster is needed to counteract the negative buoyancy of the cable winch, resulting in significant consumption.
So for suspended operations, when encountering ocean currents, strong resistance ability to the current is needed. When encountering the undulating seabed surface, suspended cable laying cannot adjust its position up and down with the seabed surface undulations, and can only lay cables at the same level, resulting in the cable laying winch distance change to the seabed, so the cable laying speed need to be changed, making it difficult to lay cables.
In traditional ROV winches, the cable joints at both ends of the cable are directly fixed to the winch through ropes or clamps. Before and after laying the cable, the ROV needs to use its own mechanical arm to release the joints at both ends of the cable. During operation, it is detached to the winch, put down the winch, use the robotic arm to remove the joint, and then connect it to the upper part of the winch, carrying the winch for cable laying.
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