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sources, and also our nation's ability to take what would be a waste product and create homegrown, clean, advanced biofuels to support a variety of transportation needs." In addition to the biofuel, the Stennis CSG was using energy conservation measures (ECMs) when it deployed, including stern flaps that reduce drag and resistance, LED lights, and energy efficient operational procedures, all of which were phased into use by other ships, aircra, amphibious and other expeditionary forces during 2016. About six months aer its launch, the Stennis CSG and ships from eight partner navies used U.S.-made alter- native fuel while participating in the RIMPAC (Rim of the Pacific) international exer- cise with 19 other nations. Approximately 11.2 million gallons of a 90-10 blend of petroleum and alternative fuel were used over the course of the exercises, up drastically from the 900,000 gallons of a 50-50 blend of petroleum and renewable diesel used by U.S. Navy ships and aircra in the original 2012 Green Strike Group exercises. Although a tallow-based alternative fuel was used during RIMPAC 2016, alter- native fuels can also be made using algae, animal waste oil, or non-food crops. One crop the Navy has experimented with is based on camelina, a small mustard seed that can be grown in rotation with wheat. At least one supersonic jet, the F-18 Super Hornet, has flown on a mixture of fuel and a camelina-based biofuel since 2010, and many other blends have been used as well. e Navy requires that all alternative fuels be "drop-in," meaning they require no modifications to engines or procedures. Although there were signifi- cant problems meeting this requirement in the early years of the program, biofuels are now purchased at prices close to the cost of traditional petroleum. e alternative fuel blend used by the Stennis CSG, for example, was procured via AltAir Fuels, which was awarded a contract for 77.6 million gallons at a cost to the Defense Logistics Agency of $2.05 per gallon. While the goal of sailing a Green Strike Group by 2016 has been met, the techniques used and lessons learned are now being applied throughout the Fleet, which will continue to improve fuel efficiency and flexibility over the coming years. Reducing Non- Tactical Petroleum Use GOAL 3: "By 2015, DoN will reduce petroleum use in the commercial fleet by 50%." STATUS: Making progress, but not there yet. e commercial fleet is com- prised of all the vehicles used to support the DoN – cars, trucks, buses, and other vehi- cles used to transport person- nel or supplies. To reduce petroleum consumption, the DoN has taken steps to "right-size" the vehicle fleet, largely by using telematics to record usage data to see whether specific vehicles should be replaced with alternative-fuel vehicles or simply eliminated. Although telematics installation was not completed U.S. NAVY 26 Navy | Winter 2017 The Navy increased its hybrid fleet by more than 750 vehicles over the past year, helping the Navy stay ahead of stricter emissions regulations while reducing operations and maintenance costs.

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