The USS Constitution stands alone.

The American frigate, known for its role in the War of 1812, is now the only ship in the U.S. Navy to sink an enemy vessel in action. The only other ship to share that title, the 30-year-old USS Simpson, was decommissioned on Tuesday.

The ship, also known as Old Ironsides, is currently in dry dock in the Charlestown Navy Yard for a two-year restoration project, estimated between $10 and $15 million.

The Constitution shared the news with a post on its Facebook page:

USS Constitution is now the only ship in the U.S. Navy to sink an enemy vessel in action. The USS Simpson, the only... Posted by USS Constitution on Tuesday, September 29, 2015

The Constitution through the years: