The United States Navy is the sea branch of the United States Armed Forces. It is one of the seven uniformed services of the United States. The U.S. Navy has about 332,000 personnel on active duty and 124,000 in the Navy Reserve. It operates 283 ships in active service and more than 3,700 aircraft. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest combined. There are 2 People in United States Navy Jacob's Academy.