Hull cleaning underwater ROV

Our innovative splash zone concept is based on a magnetic crawler, together with our developed navigation system. In 2012, we participated in an offshore operation where the task was to install a 6inch blind plug into a sea chest on the FPSO. From the construction vessel, a normal Work Class ROV needed to fly to the FPSO, and install the small plug 4 meters below the waterline.The operation took place during November, in the harsh North Sea environment. Due to the buoyancy of the ROV; the maneuver of the vehicle was almost impossible due to waves and surface sea current. A weather limit of 2.0m Hs was required for the operation, and significant HSE measurements were taken to protect the ROV from collision with the hull. Almost 10 days the construction vessel with a crew of 55 persons, had to wait for proven weather conditions. Back at the office, surprised at the challenges that these beforehand seemingly simple plug operations had presented, we started to look for new solutions. A way to challenge not only the Law of Archimedes,but also some of the general principles of Physics and Hydrodynamics. Four years later, the result is presented in the form of the NorHull Vehicle. A complete work class crawler that is able to interface familiar ROV tools, but on a unique kind of platform. Operated from a single 20” container, deployed in 4.5m Hs weather.