PACIFIC OCEAN (April 4, 2012) The Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) performs a nighttime replenishment at sea with the guided-missile destroyer USS Paul Hamilton (DDG 60) during maritime exercise Koa Kai 12-2. Koa Kai is a semi-annual exercise in the waters around Hawaii designed to prepare independently deploying ships in multiple warfare areas and provide training in a multi-ship environment. (US Navy Photo by Mass Communication Specialist 2nd Class Daniel Barker/Released)

[Image courtesy of the US Pacific Fleet Flickr Stream.]