We have done some video surveys of the mooring lines and the export cable of the largest grid-connected Floating Wind Turbine in France. The Floatgen turbine, 2MW capacity, is being tested at the SEMREV offshore test site operated by Ecole Centrale de Nantes.
Although this was a very steep learning curve for us, we got some very nice results.
Although the wind (<5 knots) and waves (<1m) conditions were ideal, the lines and cables were still moving. It worked OK, however a video stream with less latency and a professional controller would definitely improve survey performance. Several solutions are already described in the forum, we just need to purchase/implement them before the next job !
Many thanks to BlueRobotics people for the product and support. Many thanks to the people on this forum.
We did not use any positioning on the ROV itself. The screenshot of OpenCPN only shows the position of the support vessel (as well as Heading and Course Over Ground which helps for navigation).
We were mostly interested in checking the integrity (and marine growth) of the lines and cable for this first job. Some USBL system is however planned for the next job to survey positions as well.
