Abstract
Abstract Objectives/Scope: The paper presents results from developing a specialized Survey-ROV (Remotely Operated Vehicle) aimed at higher speed and unsurpassed resolution. Multi beam, laser and photogrammetry data will be presented. Methods, Procedures, Process: The Surveyor Interceptor is a newly developed specialized Survey ROV. It has a hydro dynamically favorable hull, thin tether, and powerful propulsion to allow high resolution surveys, close to the seafloor, at speeds up to 10 knots. The ROV was built during 2014 and has been tested during Quarter 1 2015. This paper presents results from tests and the first commercial tasks for the new SROV. The ROV has been used for pipelines, route surveys and environmental surveys in the North Atlantic at water depths between 50 -1200m. Acquired data will be presented. Performance as well as resolution and accuracies obtained are above the initial specifications and new technologies are developed. The combination of high resolution equipment in a stable hull, renders accurate data for enhanced risk mitigation of offshore installations Results, Observations, Conclusions: The SROV has surveyed with average speed of above 4 knots at several hundred meters water depth while collecting data from Multibeam echo sunders, laser bathymetry, still photos, photogrammetry, Side Scan Sonar’s and Sub Bottom Profilers. The Underwater Navigation results are greatly improved by the use of inverted USBL, DVLs and INS systems. The vehicle is very stable at speed, thus rendering clean data with very little outliers. All in all the total concept can reduce the cost of pipeline and route surveys with improved data quality. Integrity Management decisions based on data from the SROV will greatly reduce risk of offshore pipelines and installations. Novel/Additive Information: Specialized Survey ROV’s will lower the cost for Pipeline Inspection and Environmental Impact Surveys while rendering 3D models and resolution of hitherto unseen density and accuracy.
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