Navy Petty Officer 1st Class Kurt Hassler releases a marker buoy during diving operations while participating in Clear Horizon in South Korean waters, Oct. 17, 2016. CH16 is a live-action exercise which enhances cooperation and improves capabilities in mine countermeasures operations, with participating nations South Korea, the United States, Australia, Canada, New Zealand, the Philippines, Thailand, and the United Kingdom. Navy photo by Petty Officer 2nd Class Daniel Rolston