The keel has been laid for the United States' first plug-in hybrid service operation vessel (SOV) at Edison Chouest Offshore's (ECO) LaShip Shipyard in Houma, La.Louisiana-based ECO has a 10-year charter agreement to operate the SOV for Empire Offshore Wind…<p><p>https://www.marinelink.com/news/keel-laid-us-first-plugin-hybrid-sov-507241</p></p>