Harvey Gulf International Marine has announced that it has acquired the assets of Trinity Yachts as well its affiliated commercial vessel companies. The shipyards in New Orleans, Louisiana and Gulfport, Mississippi, were branded in 2013 under the name of the Gulf Coast Shipyard Group. Terms were not disclosed.

Harvey Gulf describes itself on its website as “a marine transportation company that specialises in providing Offshore Supply and Multi-Purpose Support Vessels for deepwater operations in the US Gulf of Mexico.”

The new affiliated company, now called Harvey Shipyard Group, will focus on constructing the nation’s first liquefied natural gas-powered offshore supply vessels for the oil and gas drilling market. Six of those vessels, according to TheAdvocate.com, are being built by Gulf Coast Shipyard for Harvey Gulf. They can also run on diesel fuel.

The company said in a statement that it expects to expand operations in Gulfport and New Orleans as it continues to develop its dual-fuel ship design, engineering and construction for marine transportation industry clients. It is investing US$350m in the dual-fuel offshore fleet.

“These shipyard acquisitions will position Harvey Gulf as America’s only builder, owner and operator of dual-fuel (diesel/LNG) offshore supply vessels and allow us to pass along the savings of lower operating costs and environmental protection to the marine transportation industry,” said Shane Guidry, chairman and chief executive officer of Harvey Shipyard Group HGIM, in a statement.

An email to a Trinity executive requesting clarification on Trinity’s future were not returned by press time.