The U.S. Navy flag represents the United States Navy and is used for official Navy purposes only. The flag features the words "United States Navy" on a gold ribbon below the seal. The seal depicts a bald eagle holding an anchor over a tri-mast ship. 
What do the different parts of the flag mean?
Battle streamers: Long, narrow ribbons that represent war and non-war combat actions. Silver and bronze stars on the streamers indicate specific campaigns and actions. 
National ensign: The American flag, which is the most honored flag in the Navy. 
Seal: The seal features a bald eagle holding an anchor over a tri-mast ship. The seal also includes the words "United States of America" and "Department of the Navy". 
Ribbon: The gold ribbon below the seal displays the words "United States Navy".