Offshore energy installations, whether oil and gas or renewables, need to monitor for scouring and other changes in the seabed around underwater pipelines and cables, and the foundations of structures. They also generally have a support fleet that makes regular trips to the platforms. By logging depths from the support boats and other vessels operating in the vicinity, depths can be monitored. Whilst the resolution is not high enough to detect localised exposure of a pipeline or cable, it can pick up movements of underwater dunes and similar changes in the sea bed. These can be monitored and, when necessary, a survey with an ROV or multi-beam system can be triggered.
Whilst the risk of damage to underwater cables is low, the impact is high. A significant proportion of offshore wind farms have just a single cable from the sub-station linking the turbines to the shore. If this fails, repair times are typically 3 or 4 months, so a large proportion of the year's energy output is lost. Use of TeamSurv offers a cost effective tool for monitoring changes in the sea bed, by utilising the support boats already operating for the facility.