Pinetree Line – Miscellaneous Radar in Canada – No 2 RDF Maintenance Unit Click on the description text to view the detail. Daily Diary – 1 April 1943 to 31 October 1943. Courtesy National Archives of Canada. SECRET Organization Order No. 101 – 23 October 1942. Formation of 2 RDF Maintenance Unit. Courtesy National Archives of Canada. Home War Establishment – 25 September 1942. Courtesy National Archives of Canada. Home War Establishment – 25 September 1942. Courtesy National Archives of Canada.