Ronald Cuthbert Hay, (4 October 1916 – 22 November 2001) was a British naval aviator and the only Royal Marine fighter ace. He joined the Royal Marines in 1935 and then served as an aviator with the Fleet Air Arm. In 1940 he joined 801 Naval Air Squadron flying the two seater Blackburn Skua on for the Norwegian campaign, claiming his first victory on his first operational flight. He took part in operations covering the evacuation of the British Expeditionary Force from the Dunkirk beaches. Flying the Fairey Fulmar, he joined 808 Naval Air Squadron during the Battle of Britain.