Harvey Gulf International Marine is now the first and only company in the U.S. to own and operate a “Tri-Fuel” — diesel, LNG, and battery — vessel, Harvey Energy — as well as a vessel bunkering facility, selling both diesel fuel, and LNG. Harvey completed the installation of a Wartsila battery-power system on the Harvey Energy, which was already a dual-fuel vessel capable of fully operating on LNG or diesel, making it a “Tri-Fuel” vessel.
At the same time, the company began operations at its new...
https://www.workboat.com/news/offshore/harvey-gulf-introduces-tri-fuel-osv/