Admiral Sir Robert Calder, 1st Baronet, was a British naval officer who served in the Seven Years' War, the American Revolutionary War, the French Revolutionary Wars and the Napoleonic Wars. For much of his career he was regarded as a dependable officer, and spent several years as Captain of the Fleet under Admiral Sir John Jervis. However, he is chiefly remembered for his controversial actions following the Battle of Cape Finisterre in 1805 which resulted in his court-martial. Though he was removed from his sea command, he was retained in the Navy and later served as Commander-in-Chief of the base at Plymouth.

Admiral of the Fleet John Jervis, 1st Earl of St Vincent was an admiral in the Royal Navy and Member of Parliament in the United Kingdom. Jervis served throughout the latter half of the 18th century and into the 19th, and was an active commander during the Seven Years' War, American War of Independence, French Revolutionary War and the Napoleonic Wars. He is best known for his victory at the 1797 Battle of Cape Saint Vincent, from which he earned his titles, and as a patron of Horatio Nelson.