She was credited with the capture on 5 August 1812 of the American ship "Asia", of 251 tons, which had been sailing from St. Mary's to Plymouth with a cargo of timber. "Royal Sovereign" shared the proceeds of the capture with all the vessels in Keith's squadron, suggesting that what happened was that "Asia" sailed into Plymouth unaware that the War of 1812 between Britain and the United States had broken out and was seized as she arrived, the formal credit going to the flagship.