The Atlantic Star was awarded for six months service afloat in the Atlantic or in Home Waters within the period from 3 September 1939 to 8 May 1945. It was also awarded to air crew who had taken part in operations against the enemy at sea within the qualifying areas, subject to having served for two months in an operational unit. The 1939–1945 Star must have already been earned by six months service, or two months for air crew, before commencing qualifying service for the Atlantic Star.