Exercise RIMPAC 12 consists of Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel have participated in RIMPAC exercise from 29 June to 3 August, 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.