Harvey Gulf Awarded Four Long Term OSV Charters and Orders 9,000 Long Ton Drydock. Today, Harvey Gulf International Marine announced that it has signed long term charters for 3 of its LNG powered Offshore Supply Vessels, making Harvey Gulf the first company to build and contract Liquefied Natural Gas powered Offshore Support Vessels for Deepwater Exploration and Production in America. The HARVEY ENERGY, HARVEY POWER and HARVEY LIBERTY will begin providing deepwater OSV services immediately upon delivery in 2013 and 2014.