The British took "Décade" into service. "Naiad"s success in prize-taking continued. On 5 March 1799 she captured the French privateer "Hereux Hazard", off the Loire. "Heureux Hazard" was armed with sixteen 6 and 9-pounder guns, but was pierced for 20 guns. She had a crew of 94 men and had left Nantes the previous day, provisioned for a three-month cruise. At the time of the capture and were in sight, and so entitled to share in the prize money. The next day "Naiad" met up with "Ethalion", which had just that day too captured the privateer "Indefatigable", of 18 guns and 120 men. "Indefatigable" too was just one day out of Nantes and provisioned for a long cruise. On 12 March "Naiad", , , and were in company when "Triton" captured the French merchant brig "Victoire". In September "Naiad" recaptured the ship "Princess Royal". However, "Naiad"s biggest prize was yet to come. On 15 October 1799 "Naiad" sighted two Spanish frigates. Pierrepont gave chase and before dawn spotted them and joined the pursuit. At 7.00 am the two Spaniards parted company so Pierrepont followed one frigate, together with and "Triton", which too had joined the chase, while directing "Ethalion", to pursue the other frigate. By 11.30 am, "Ethalion" had caught up with her quarry and after a short engagement the Spanish vessel struck her colours. "Ethalion" had no casualties though the Spaniard had one man killed and nine wounded. "Triton", the fastest of the three British frigates, led the chase of the first frigate. The next morning "Triton" struck some rocks as she tried to prevent her quarry from reaching port. "Triton" got off the rocks and resumed the chase despite taking on water. She and "Alcmene" then exchanged fire with the Spanish frigate, which surrendered before "Naiad" could catch up. Four large Spanish ships came out from Vigo but then retreated when the three British frigates made ready to receive them. "Alcmene" had one man killed and nine wounded, and "Triton" had one man wounded; had two men killed and eight men wounded.