HMS Dolphin was a 24-gun sixth-rate frigate of the Royal Navy. Launched in 1751, she was used as a survey ship from 1764 and made two circumnavigations of the world under the successive commands of John Byron and Samuel Wallis. She was the first ship to circumnavigate the world twice. She remained in service until she was paid off in September 1776. She was broken up in early 1777.

Vice-Admiral John Byron was a British Royal Navy officer and explorer. He earned the nickname "Foul-Weather Jack" in the press because of his frequent encounters with bad weather at sea. As a midshipman, he sailed in the squadron under George Anson on his voyage around the world, though Byron's ship, HMS Wager, made it only to southern Chile, where it was wrecked. He returned to England with the captain of the ship. He was governor of Newfoundland following Hugh Palliser, who left in 1768. He circumnavigated the world as a commodore with his own squadron in 1764–1766. He fought in battles in the Seven Years' War and the American Revolution. He rose to Vice Admiral of the White before his death in 1786.