HMS Thetis was a 32-gun fifth-ratefrigate of the Royal Navy, built by Wyatt & Co. at Buckler's Hard shipyard in 1773.
From 1777 to 1781 she served with the North American squadron. In January, 1778 she was under the command of Capt. John Gell.[1]
Thetis took part in the action of 9 August 1780, when a convoy she was escorting fell prey to a Franco-Spanish squadron. 55 merchantmen were captured, but she managed to escape.[2]