NEW : Weather conditions improve . The operation will be challenging because of high seas , officials said . The freighter suffered engine loss off the Aleutian Islands . Rescue aircraft and vessels are assisting the crew . A U.S. Coast Guard helicopter flies over a ship that ran aground in Alaska on July 29.
NEW : Weather conditions improve . The freighter suffered engine loss off the Aleutian Islands . Rescue aircraft and vessels are assisting the crew . A U.S. Coast Guard helicopter flies over a ship that ran aground in Alaska on July 29.