Carteret was the son of Charles de Carteret, Seigneur of Trinity, and his wife Frances-Mary S. Paul.[1]
Carteret entered the navy in 1747, serving aboard the Salisbury, and then under Captain John Byron from 1751 to 1755. Between 1757 and 1758 he was in the Guernsey on the Mediterranean Station. As a lieutenant in the Dolphin he accompanied Byron during his voyage of circumnavigation, from June 1764 to May 1766.[2]
The following year he returned to Jersey as seigneur of Trinity and took part in Jersey politics. He was promoted to post-captain in 1771 and was in London on 5 May 1772, when he married Mary Rachel Silvester (1741–1815), a doctor's daughter. Four of their five children survived to adulthood, including:
the second son, Philip Carteret Silvester (1777–1828), entered the navy like his father and inherited a baronetcy from his maternal uncle Sir John Silvester
Carteret's health was ruined by his voyage of exploration, and he received little reward from the Admiralty. He did not have the patrons which were necessary for naval promotion at this time, and this and his complaints before the voyage on the Swallow's ill-suitedness to the voyage ensured that his requests for a new ship in 1769 fell on deaf ears. Put on half-pay, the petition for increasing half-pay which he got together helped many officers, but not Carteret himself. In the meantime, in 1773, his journals of the voyage were published as part of An Account of the Voyages undertaken by Byron, Wallis, Carteret and Cook, but that volume's editor John Hawkesworth made many changes to his account and so Carteret drafted a correct version of his own (which, however, only got published in 1965, by the Hakluyt Society).
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His new ship, HMS Endymion, at last came on 1 August 1779 and despite problems in the Channel, off Senegal and off the Leeward Islands (at the last of which Carteret was nearly killed in a hurricane) he arrived in the West Indies as instructed. Despite having a share in four prize ships, he was paid off and the Endymion transferred to another captain. All his petitions for a new ship were unsuccessful and he had a stroke in 1792, retiring to Southampton in 1794 with the rank of rear admiral. He died there two years later and was buried in the catacombs of All Saints' Church, Southampton. In 1940 the church was destroyed by German bombing. In 1944 the bodies beneath it were reburied in Hollybrook Cemetery in Southampton.