170223-N-OH262-321 ATLANTIC OCEAN (Feb. 23, 2017) The Military Sealift Command hospital ship USNS Comfort (T-AH 20) transits the Atlantic Ocean. Comfort's underway period was part of the 2017 Comfort Exercise (COMFEX). The exercise is a quarterly training battery designed to keep the medical personnel, support staff and civil service mariners who serve aboard the ship proficient in their duties. Comfort provides an afloat, mobile, acute surgical medical facility when called upon to the U.S. military, and hospital services to support U.S. disaster relief and humanitarian operations worldwide. (U.S. Navy photo by Bill Mesta/Released)