On-line Flag Catalog > Nautical & Marine Flags > UNION JACK FLAG

The Union Jack Flag of the U.S. has the same number of stars as the ensign. Currently 50 white stars on a blue field. On 31 May 2002, the Secretary of the Navy has directed all U.S. naval ships to fly the First Navy Jack for the duration of the war on terrorism, starting September 11, 2002 (Patriot Day.) The jack is flown on the bow (front) of a ship and the ensign is flown on the stern (rear) of a ship when anchored or moored. Once underway, the ensign is flown from the main mast. The size of the jack should be the same as the canton of the ensign.