Harvey Gulf International Marine has selected maritime classification society American Bureau of Shipping (ABS) to certify two dual-fuel offshore supply vessels (OSV).

The OSVs include Harvey Energy and Harvey Supporter, which are currently being retrofitted with a battery / converter system.

Upon completion of the battery installation, the ships would achieve the ABS class notation ESS-LiBATTERY.

According to the classification society, Harvey Energy would become the first ABS-classed dual-fuel and battery powered vessel. It will also be the first US flagged OSV to feature a battery / converter system.

Harvey Supporter will become the second vessel fitted with a battery power system.

ABS global offshore senior vice-president Matt Tremblay said: “ABS is a leader in hybrid projects in the offshore sector and we are proud to be involved in another project driving the sustainable development of the industry.

“The project will effectively create tri-fuelled vessels with significant potential to reduce fuel consumption and emissions.”

Harvey Gulf chairman and CEO Shane Guidry said: “We chose ABS due to its significant experience in LNG and dual fuel energy. We are pleased to add them to our project team, which is committed to delivering the best emissions and fuel savings technologies to our customers, our country and our industry.”

With the 1,450kW battery hybrid solution, Harvey Energy’s exhaust emissions, fuel consumption, and noise level is expected to reduce.

Harvey Gulf International claims that the overall fuel cost savings will be in between 10% and 20%.

The battery generated electric power will be enough to allow the ship to sail in and out of harbour.