161015-N-KT595-355 SAN DIEGO (Oct. 15, 2016) Sailors assigned to Undersea Rescue Command from Naval Air Station North Island perform pre-dive checks during a training exercise in the submarine rescue capsule. Simulating a submarine rescue, the capsule operators dove to a depth of 37 feet for 90 minutes. (U.S. Navy photo by Petty Officer 2nd Class Chad M. Butler/Released)