HMS Torbay is a decommissioned Trafalgar-class nuclear submarine of the Royal Navy and the fourth vessel of her class. Torbay was the fifth vessel and the second submarine of the Royal Navy to be named after Torbay in Devon, England. The first vessel was the 80-gun second rate HMS Torbay launched in 1693. She was the first vessel to be fitted with the new command system SMCS-NG.