During the French Revolutionary and Napoleonic Wars the Admiralty also made use of hired armed vessels, one of which was the hired armed cutter Nimrod. Three such vessels are recorded, but the descriptions of these vessels and the dates of their service are such that they may well represent one vessel under successive contracts. The vessel or vessels cruised, blockaded, carried despatches, and performed reconnaissance.
There was a Nimrod of 70 37⁄94 tons burthen and eight 3-pounder guns that served from 27 September 1794 to 9 April 1802. On 21 April 1798, Nimrod was among the vessels that shared in the capture of the French ship Hercule.
Nimrod shared with Révolutionnaire, Boadicea and Pique in the capture of the Anna Christiana on 17 May. In August Nimrod captured the chasse-marée Francine with Ambuscade, commanded by Captain Henry Jenkins, and Stag.
On 1 April 1798, Nimrod and the hired armed cutter Lurcher recaptured Roebuck packet, which the French privateer Adelaide had captured on 20 March. Nimrod and Lurcher sent Roebuck into Plymouth.
Under Lieutenant William Marsh, on 23 March 1799 Nimrod, captured the Spanish ship Golondrina. On 1 August, Nimrod arrived in Plymouth with dispatches from Vice Admiral Pole, off the Isle of Aix. Then on 25 December she helped rescue the crew of Ethalion. On 28 December 1799 she re-captured the brig Neptune. In February 1800 salvage money resulting from the re-capture of Neptune was due to be paid.
Nimrod was part of Admiral Sir John Borlase Warren's squadron and so entitled to share in the proceeds from the recapture of Lancaster on 28 June 1800. She also shared in the proceeds of Vigilant, Menais, the salvage of Industry, the sale of a wreck, and the proceeds of Insolent and Ann, all taken by Captain Edward Pellew's squadron. Next Nimrod shared in the prize money from the squadron's capture of the French privateer Guêppe.