The Great Green Fleet

Great Green Fleet background

We are transforming the Department of the Navy's energy use to make us better warfighters, deploying next-generation capabilities that boost combat effectiveness, maximize strategic options, and better protect our Sailors and Marines. The deployment of the Great Green Fleet in 2016 is using energy efficient systems and alternative energy in an operational environment, highlighting them as key enablers of combat capability.

Great Green Fleet Themes

For the Navy and Marine Corps, energy efficiency provides:

  • Combat Advantage-   Using energy efficiently enables us to go farther, stay longer and deliver more firepower.

  • Strategic Advantage-   Using alternative fuels creates flexibility and brings us closer to energy independence.

  • Force Protection Advantage-   Using energy efficiently takes fuel convoys off the road and reduces the amount of time our ships are tied to oilers, reducing vulnerabilities to Sailors and Marines.

Great Green Fleet Participation

  • Participating Ship-   A vessel with three or more Energy Conservation Measures (ECMs) in use, to include energy saving technologies and/or Operational Procedures (OPs); or one that uses alternative fuel, including nuclear power.

  • Participating Squadron-   An aviation squadron that uses two or more ECMs, including OPs; or one that uses alternative fuel.

  • Participating Expeditionary Combat Unit-   A unit that uses one or more ECMs, including OPs; or one that uses alternative fuel.

  • Participating Shore Facility-   A facility that uses OPs, energy saving technologies, and/or distributed generation technologies, such as energy storage and renewable energy systems, to optimize energy use and enhance energy security and resiliency.

Great Green Fleet Centerpiece

The centerpiece of the Great Green Fleet is the John C. Stennis Strike Group (JCSSG) using energy conservation technologies, operating procedures, and/or alternative energy in the course of its normal operations.

JCSSG Mission Statement We protect American interests on the waters of the world.

The John C. Stennis Strike Groupsynchronizes the capabilities of multiple ships and squadrons to provide coordinated forward presence around the globe. Our forces, up to 10 ships and 70 aircraft, are mission flexible and ready to engage.

From sustained air operations to maritime interdiction,we project American power.

 Graphic of John C Stennis Carrier Strike Group
 Another Graphic of John C Stennis Carrier Strike Group
Alternative

Fuels

Alternative fuel includes nuclear power for carriers and submarines, and advanced biofuel.

The Department of the Navy has certified certain biofuels which must be:

"Drop-in" Fuel

"Drop-in" replacements to conventional fuels on all ships and aircraft. This fuel requires no engine modifications or changes to operational procedures.

Competitive Price

purchased at prices competitive with conventional fuels.

Feedstocks

made from non-food feedstocks including fats, oils and greases, natural gas, coal and wood and plant fibers.

Alternative fuel and feedstock
Great Green Fleet

ashore

Installations

play a critical role in enhancing readiness, generating the force structure necessary for mission success, and enabling combat operations.

Energy Security

means the assured access to reliable supplies of energy and the ability to protect and deliver sufficient energy to meet mission-essential requirements. Renewable energy use increases resiliency and enhances the Marine Corps’ energy security.

Renewable Energy Program Office

through the Renewable Energy Program Office (REPO), had over one gigawatt (GW)* of renewable energy in procurement (at a minimum, having renewable energy requirements developed and a request for proposal issued) at the end of 2015.

*One gigawatt can power approximately 250,000 homes.

a map showing the locations of the units involved with the rescue and the location of Alabama and the lifeboat

Additional Great Green Fleet Content

Navy Energy DOD Live
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SAN DIEGO (Aug. 3, 2011) A view of solar panels recently installed on the roof of Space and Naval Warfare Systems Command Headquarters, Old Town Complex. The rooftop photovoltaic installation supports the Department of Defense�s goal of increasing renewable energy sources to 25 percent of all energy consumed by the year 2025. (U.S. Navy photo by Rick Naystatt/Released)

Photovoltaic Project

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NAVAL AIR STATION MERIDIAN, Miss. (Nov. 7, 2012) An employee with Atlantic Contingency Constructors, LLC installs a photovoltaic solar panel on the roof of the Fire and Emergency Building at the flight line as a part of a $1 billion global contingency construction contract made possible by the American Recovery and Reinvestment Act of 2009 (ARRA).  When completed in December the project is estimated to save approximately $8,750 a year in electricity. (U.S. Navy photo by Mass Communication Specialist 2nd Class Casey H. Kyhl/Released)

Photovoltaic Project

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ATLANTIC OCEAN (Feb. 5, 2011) Seaman Lehi S. Caldwell, assigned to the guided-missile cruiser USS Anzio (CG 68), sends signals to the Military Sealift Command fleet replenishment oiler USNS John Lenthall (T-AO 189) during a replenishment at sea. Anzio is underway as part of the George H.W. Bush Carrier Strike Group conducting a composite training unit exercise in preparation for an upcoming combat deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Brian M. Brooks/Released)

RIMPAC 2012

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NAVAL BASE CORONADO, Calif. (June 13, 2009) Photovoltaic systems at Naval Base Coronado generate 4,112 kilowatt-hours of electricity per day, or more than 1.5 million kwh per year. Photovoltaic systems save the Navy $187,000 annually and reduce the total energy the Navy has to purchase. (U.S. Navy photo/Released)

Photovoltaic Project

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TWENTYNINE PALMS, Calif. (Feb. 13, 2009) An array of solar panels supplies energy for necessities at Marine Corps Air Ground Combat Center Twentynine Palms, Calif. (U.S. Marine Corps photo by Pfc. Jeremiah Handeland/Released)

Photovoltaic Project

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PEARL HARBOR (JULY 18, 2012) Lt. j.g. K. Smith, right, explains energy-efficient systems aboard the guided-missile destroyer USS Chafee (DDG 90) to Secretary of the Navy (SECNAV) the Honorable Ray Mabus during the U.S. Navy's Great Green Fleet demonstration. Mabus observed the large-scale demonstration of the Navy Surface Ship Energy Efficiency Initiatives during the 2012 Rim of the Pacific (RIMPAC) exercise, the world's largest international maritime exercise. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 17, 2012) The biofuel is tested in the fuel lab aboard the aircraft carrier USS Nimitz (CVN 68). Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Devin Wray/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 17, 2012) Aviation Boatswain's Mate (Fuels) 3rd Class Joshua Palomares checks the specific gravity of biofuel with a thermo hydrometer in the quality surveillance fuel shop aboard the aircraft carrier USS Nimitz (CVN 68) during a replenishment at sea. Nimitz took on 200,000 gallons of a 50-50 blend of advanced biofuels and traditional petroleum based fuel during the U.S. Navy's Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. (U.S. Navy photo by Mass Communication Specialist 3rd Class Devin Wray/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 17, 2012) The Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) is underway with the aircraft carrier USS Nimitz (CVN 68) during a replenishment at sea. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 8, 2012) A Sailor assigned to the Arleigh Burke-class guided-missile destroyer USS Chafee (DDG 90) uses the ship's shipboard energy dashboard during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012. The dashboard provides real-time situational awareness of energy demand associated with equipment, which allows the crew to minimize a ship's energy consumption and increase its efficiency while meeting system performance and reliability requirements. In 2009, Secretary of the Navy Ray Mabus announced five aggressive energy goals to reduce the Department of Navy's consumption of energy, decrease its reliance on foreign sources of oil, and significantly increase its use of alternative energy. One of the five energy goals is to demonstrate and then deploy a

RIMPAC 2012

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PEARL HARBOR (July 9, 2012) A stern flap extends from the stern of the guided-missile destroyer USS Stockdale (DDG 106). A stern flap is an extension of the hull bottom surface which extends aft of the transom and is used to modify the flow field under the hull afterbody, decreasing flow velocity and increasing pressure, resulting in reduced drag, reduced turbulence, and thus, reduced hull resistance. Stockdale is participating in Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the biennial RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy Photo by Mass Communication 1st Class Tony Spiker/Released)

Ship stern flap

In preparation of Javelin Thrust 2012, Marines from Marine Forces Reserve and 2nd Tank Battalion, learn to setup and operate the Ground Renewable Expeditionary Energy Network System and the Solar Portable Alternative Communications Energy System during a training session conducted by personnel from Marine Forces Pacific Experimentation Center June 28, 2012. (Official US Marine Corps photo by Diane Durden / Released)

Photovoltaic Project

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MANCHESTER, Wash. (June 13, 2012) Fuels Distribution Systems Operator David Riggs, from Fleet Logistic Center Puget Sound Manchester Fuel Department, tightens bolts on a fueling hose during a biofuels transfer to the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187). Henry J. Kaiser took on 900,000 gallons of a 50/50 blend of advanced biofuels and is scheduled to deliver the biofuels to platforms participating in the Great Green Fleet demonstration during the exercise Rim of the Pacific (RIMPAC) 2012. (U.S. Navy Photo by Mass Communication Specialist Seaman Chris Brown/Released)

RIMPAC 2012

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MANCHESTER, Wash. (June 13, 2012) Fuels Distribution Systems Operator David Riggs, from Fleet Logistic Center Puget Sound Manchester Fuel Department, secures a fueling hose during a biofuels transfer to the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187). Henry J. Kaiser took on 900,000 gallons of a 50/50 blend of advanced biofuels and is scheduled to deliver the biofuels to platforms participating in the Great Green Fleet demonstration during the exercise Rim of the Pacific (RIMPAC) 2012. (U.S. Navy Photo by Mass Communication Specialist Seaman Chris Brown/Released)

RIMPAC 2012

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JACKSONVILLE, Fla. (May 1, 2012) Some of the 2,534 solar photovoltaic (PV) panels installed on the roof of Naval Air Station Jacksonville's Hangar 1122 to help reduce the building's conventional energy usage and promote environmental sustainability. (U.S. Navy Photo by Clark Pierce/Released)

Photovoltaic Project

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PACIFIC OCEAN (July 18, 2012) The guided-missile cruiser USS Princeton (CG 59) pulls alongside the military sealift command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) to refuel at sea with biofuel during The Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Princeton took on a 50-50 blend of advanced biofuel and traditional petroleum-based fuel. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world�s largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world�s oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Andrew M. Jandik/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The guided-missile cruiser USS Princeton (CG 59) pulls alongside the military sealift command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) to refuel at sea with biofuel during The Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Princeton took on a 50-50 blend of advanced biofuel and traditional petroleum-based fuel. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world�s largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world�s oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Andrew M. Jandik/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The guided-missile destroyer USS Chung-Hoon (DDG 93) and the aircraft carrier USS Nimitz (CVN 68) are underway during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The aircraft carrier USS Nimitz (CVN 68) participates in the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The aircraft carrier USS Nimitz (CVN 68) participates in the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PEARL HARBOR (JULY 18, 2012) The Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187), left, delivers a 50-50 blend of advanced biofuels and traditional petroleum-based fuel to the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012 exercise. In the background are the aircraft carrier USS Nimitz (CVN 68) and the guided-missile destroyer USS Chung-Hoon (DDG 93). Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the biennial RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Ryan J. Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The guided-missile destroyer USS Chung-Hoon (DDG 93) participates in the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012 exercise. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The guided-missile cruiser USS Princeton (CG 59) flies the Energy Security flag during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan Mayes/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) An F/A-18F Super Hornet sits in the hangar bay of the aircraft carrier USS Nimitz (CVN 68) during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Chris Bartlett/Released)

RIMPAC 2012

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PACIFIC OCEAN (JULY 18, 2012) Chief of Naval Operations (CNO) Adm. Jonathan Greenert, left, and Secretary of the Navy (SECNAV) the Honorable Ray Mabus observe as the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187), background, transfers biofuels to the guided-missile cruiser USS Princeton (CG 59) during a replenishment at sea. The fueling is part of the U.S. Navy's Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)

RIMPAC 2012

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PACIFIC OCEAN (JULY 18, 2012) Secretary of the Navy (SECNAV) Ray Mabus embarks aboard the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012. Mabus, Chief of Naval Operations (CNO) Adm. Jonathan Greenert and other senior Navy leaders were on hand to witness the large-scale demonstration of the Navy's use of alternative energy and energy efficiencies during RIMPAC, the world's largest international maritime exercise. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)

RIMPAC 2012

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PACIFIC OCEAN (JULY 18, 2012) Secretary of the Navy (SECNAV) Ray Mabus observes flight operations of aircraft operating on biofuel blends aboard the aircraft carrier USS Nimitz (CVN 68) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012. Mabus, Chief of Naval Operations (CNO) Adm. Jonathan Greenert and other senior Navy leaders were on hand to witness the large-scale demonstration of the Navy's use of alternative energy and energy efficiencies during RIMPAC, the world's largest international maritime exercise. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The aircraft carrier USS Nimitz (CVN 68) is underway during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Nimitz took on 200,000 gallons of biofuel in preparation for the Great Green Fleet demonstration during Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 2nd Class Eva-Marie Ramsaran/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) The guided-missile cruiser USS Princeton (CG 59) and the aircraft carrier USS Nimitz (CVN 68) are underway in formation during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Princeton and Nimitz took on a 50-50 blend of advanced biofuel and traditional petroleum-based fuel. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 2nd Class Eva-Marie Ramsaran/Released)

RIMPAC 2012

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PACIFIC OCEAN (July 18, 2012) Sailors assigned to Cargo Afloat Rig Team (CART) 1 and crew members aboard the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) prepare to transfer biofuel to the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exercise. Princeton took on a 50-50 blend of advanced biofuel and traditional petroleum-based fuel. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 2nd Class Eva-Marie Ramsaran/Released)

RIMPAC 2012

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SOUTH CHINA SEA (July, 23, 2015) Lt. j.g. Hasenbank, center, mentors new ensigns as he stands his last officer of the deck watch aboard the littoral combat ship USS Fort Worth (LCS 3) during a Singapore Strait transit. Hasenbank was one of the first assigned ensigns to the LCS program and the first ensign to earn a Surface Warfare Officer pin on an LCS. Currently on a 16-month rotational deployment in support of the Indo-Asia-Pacific-Rebalance, Fort Worth is a fast and agile warship tailor-made to patrol the region's littorals and work hull-to-hull with partner navies, providing the U.S. 7th Fleet with the flexible capabilities it needs now and in the future (U.S. Navy photo by Lt. James Arterberry/Released)

RIMPAC 2012

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MEDITERRANEAN SEA (Oct. 16, 2014) Sailors aboard the Arleigh Burke-class guided-missile destroyer USS Mitscher (DDG 57) line up as the ship pulls away from the Military Sealift Command fleet replenishment oiler USNS Leroy Grumman (T-AO 195) after an underway replenishment and refueling at sea. Mitscher, homeported in Norfolk, Va., is conducting naval operations in the U.S. 6th Fleet area of responsibility in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Anthony R. Martinez/Released)

RIMPAC 2012

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PACIFIC OCEAN (June 24, 2014)  Sailors monitor the refueling probe aboard the amphibious assault ship USS Peleliu (LHA 5) during a replenishment-at-sea with the Military Sealift Command fast combat support ship USNS Rainer (T-AOE 7). Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 26 to Aug. 1, in and around the Hawaiian Islands.  (U.S. Navy photo by Mass Communication Specialist 2nd Class Amanda R. Gray/Released)

RIMPAC 2012

Sailor jumping

Photovoltaic Project

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NAPLES, Italy (Oct. 17, 2013) A view of Solar panels installed on top of a parking garage at Naval Support Activity Naples Capodichino. (U.S. Navy photo by Mass Communication Specialist Seaman Weston Jones/Released)

Photovoltaic Project

130920-N-OF713-004 CAMP H.M. SMITH, Hawaii (Sept. 20, 2013)  The uncovered parking lot at the Camp H.M. Smith Fitness Center has numerous light poles that include a photovoltaic panel and LED light fixture. (U.S. Navy photo by Denise Emsley, Public Affairs Officer/Released)

Photovoltaic Project

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MILLINGTON, Tenn. (May 29, 2013) Cmdr. Brad Meeks, executive officer of Naval Support Activity Mid-South, and Lt. Cmdr. Gregg Benton, public works officer of Naval Facilities Engineering Command at Naval Support Activity Mid-South, stand with members of the Naval Facilities Engineering Command public works team during a ribbon cutting for the installation's new photovoltaic charging station. The photovoltaic charging station uses solar energy to charge electric and hybrid vehicles. (U.S. Navy photo by Mass Communication Specialist 1st Class  William Jamieson/Released)

Photovoltaic Project

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SAN CLEMENTE ISLAND, Calif. (Aug. 23, 2012) The new Naval Facilities Engineering Command Southwest state-of-the-art bachelor enlisted quarters facility at Naval Auxiliary Landing Field San Clemente Island. The facility features energy and environmentally friendly designs such as a roof with solar electricity generation and wind power generation. (U.S. Navy photo by Mass Communication Specialist 2nd Class Dominique Pineiro/Released)

Photovoltaic Project

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JOINT BASE PEARL HARBOR-HICKAM, Hawaii (July 19, 2012) Solar panels form part of the Renewable Hydrogen Fueling and Production Station on Joint Base Pearl Harbor-Hickam. It is the only hydrogen station in Hawaii and about 30 hydrogen-powered vehicles use the JBPHH station. (U.S. Navy Photograph by Mass Communication Specialist 2nd Class Daniel Barker/Released)

Photovoltaic Project

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PACIFIC OCEAN (July 18, 2012) Secretary of the Navy (SECNAV) the Honorable Ray Mabus and Rear Adm. Tim Barrett, commander of the Australian Fleet, shake hands after signing an energy efficiency pact during the Great Green Fleet demonstration portion of the Rim of the Pacific (RIMPAC) 2012 exerciseexercise aboard the aircraft carrier USS Nimitz (CVN 68). Nimitz took on 200,000 gallons of biofuel for the demonstration. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 29 to Aug. 3, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2012 is the 23rd exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 3rd Class Renee Candelario/Released)

RIMPAC 2012