Commercial Rib Charters (CRC) was contracted by RWE to operate the amphibious crew transfer vessel (CTV) "CRC Walrus" for servicing the Scroby Sands offshore wind farm under a six-year contract. The vessel was developed to provide access to turbines in Scroby Sands’ shallow-water, sandbank environment, including turbines that had become difficult to reach with conventional service vessels.