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. RIMPAC 2012 will feature the first demonstration of a U.S. Navy "Great Green Fleet," during which U.S. surface combatants and carrier-based aircraft will test, evaluate and demonstrate the cross-platform utility and functionality of biofuels.