More than six years after it was first announced, the Great Green Fleet will makes its maiden voyage in late January.

The carrier strike group will deploy, fueled with a mix of biofuel and fossil fuel to showcase the Navy's goal to cut petroleum use by 2020, a spokesman for the Navy secretary said.

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"This carrier strike group will operate the same as any other deployed strike group and provide the flexible naval force that can operate in confined waters or open ocean, during day and night, around the world," Lt. Eric Durie told Navy Times.

The carrier John C. Stennis is expected to helm the Great Green flotilla when it deploys early next year from Bremerton .

In addition to working on a mix of biofuel for powering ships — Durie could not provide the exact percentage — the Navy has worked to upgrade infrastructure both afloat and ashore to save energy.

Earlier this year, Navy Installations Command announced it would replace fluorescent light bulbs in offices, gyms, streetlights and parking lots with LEDs.

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That move adds to savings from shipboard LEDs, which began rolling out in 2007.

Staff writer Sam Fellman contributed to this report.