 Dedicated air-sea rescue units were not organized by any nation until the end of World War I.Some rescues were performed, however, by individuals and groups acting on their own initiative, such as the United States Navy Reserve pilot Ensign Charles Hammann who, during the Adriatic Campaign, rescued a fellow aviator adrift in the Adriatic Sea by landing on the water in his seaplane.When the Marine Craft Section of the newly formed RAF, was formed in 1918, it inherited over 200 operational vessels, from the RNAS.