U.S. Navy Petty Officer 1st Class David Brown, a flight deck safety officer, listens to communications at the helicopter control tower as a Marine Corps CH-53 Sea Stallion helicopter lands on the flight deck aboard the dock landing ship USS Tortuga (LSD 46) on Nov. 5, 2009. The Tortuga is part of the USS Denver (LPD 9) Amphibious Task Group, which is conducting the annual bilateral Korean Integrated Training Program exercise with the embarked 31st Marine Expeditionary Unit.