In many regions around the world, the seabed is laced with hundreds of pipe and power lines, mostly from platforms to shore and between platforms, but also from one country to another. These pipes and power lines are laid by a special type of vessel, called pipe-lay vessels or barges. Some are self-propelled by highly advanced dynamic positioning systems. Others move themselves by winching in and out on steel wires attached to large anchors deployed on, and recovered from the seabed by one or more anchor handling tugs.
As an integrated navigation system software package, QINSy includes several features specially designed for pipe and cable lay that make it easy to ensure the pipe or cable is laid along the prescribed route.
QINSy uses a layback method that takes the stinger length, stinger radius, water depth, launching angle, and other parameters into account in computing the touch down point.
anchors & tugs
For vessels that move by pulling themselves forward on anchors QINSy includes various anchor handling functions, including bi-directional exchange via radio telemetry of vessel and tug position, and transmission of target pickup and drop locations to the tugs. The QINSy operator assigns anchors to tugs, which then transport and drop the anchor at the specified anchor location. On the tugs, a simple bulls-eye display shows bearing and distance to the next pickup/drop location. Own tug, vessel and other tugs are all shown on the screen, as well as any DXF drawings available that show existing platforms, pipes, cables and other relevant features. None of the tugs requires a QINSy license to run the Tug Display.