HMS Naiad was a Royal Navy frigate that served in the Napoleonic Wars. She was built by Hall and Co. at Limehouse on the Thames, launched in 1797 and commissioned in 1798. Capt. Pierrepoint took command of Naiad in April 1797. On 5 March she captured the French 20-gun privateer Hereux Hazard, off the Loire. On 11 Aug 1798 she captured the French privateer Tigre. Then on 22 Aug she and Magnanime chased and captured the French 36-gun frigate Décade, which was added to the navy as a 12-pounder, 36-gun frigate. On 15 October 1799 Naiad sighted two Spanish frigates, the Santa Brigada and Thetis, which were returning from Mexico to Spain with sterling and gold worth £311,690. She gave chase with two other British frigates, Ethalion and Alcmene. Ethalion caught and captured the Thetis, whilst Naiad and Alcmene captured the Santa Brigada.

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