 This was the main high speed launch class ship used during the Second World War and was instrumental in the rescue of Allied aircrew from the sea after they were shot down.The failure of the Marine Craft Section during the Battle of Britain led to the creation of the Air Sea Rescue Services which with the motto 'the sea shall not have them', was created to coordinate at sea rescue with its own air sea rescue squadrons, Marine Branch and Royal Navy vessels, and Coastal Command flying boats.The principles of coordinating small surface boat rescue efforts with direction and assistance from air units were developed in the 1930s in Germany.