Port Mahon was the first vessel of that name in the Royal Navy.[3]
She was ordered on 24 January 1711 from Deptford Dockyard to be built under the guidance of Joseph Allin the elder, Master Shipwright of Portsmouth. She was launched on 18 October 1711.[4]
She was commissioned in 1712 under the command of Commander William Haddock (promoted to captain in January 1713) for service with Baker's Squadron on the Portuguese coast. In 1713 she was off Sale, Morocco. She returned to Portsmouth to undergo a great repair costing £524.0.4d1/4[5] from October 1714 to December 1715. In May 1716 she commissioned under the command of Captain William Smith, RN for service in the Baltic. She returned in the autumn of 1718 for a great repair at Deptford from December 1718 to March 1719/20 at a cost of £1,181.11.11d.[6] She was commissioned in January 1720 under Captain James Luck followed by Captain Daniel Morris in September 1720 for service in the Baltic.[7] In 1722 she was on quarantine guard in 1722 then the English Channel between 1724 and 1725 for anti-smuggling operations. She was refitted at Sheerness for £1,408.6.10d[8] from September to November 1727. In November 1727 she was commissioned under Captain Christopher Pocklington for service on the Ireland station. She was paid off in November 1731.[9] In 1732 She was under Captain Samuel Atkins on the Ireland station. In June 1738 she was under Captain Gilbert Wallis for Home Waters followed by Captain John Forbes in October 1738.[10]
HMS Port Mahon was broken by Admiralty Order (AO) 4 October 1739 at Plymouth in May 1740.[11]