Operational Training Unit (OTU), and last stop before aircrew were assigned to operations. The topics included DR Navigation, Astro Navigation, Compasses and Instruments, Meteorology, Signals, Reconnaissance, Coding, Ship Recognition, Aerial Photography, and Visual Signals. Flight Lieutenant (F/L) R. E. MacBride from No. 162 (BR) Squadron RCAF trained at No. 1 GR. Aircrew spent nine weeks at a General Reconnaissance School. No. 1 General Reconnaissance School RCAF (Summerside, Prince Edward Island) (Anson) No. 31 Charlottetown, Prince Edward Island (Anson) Operational Training Units The Operational Training Unit (OTU) was the last stop for aircrew trainees. They spent 8 to 14 weeks learning to fly operational aircraft (Hawker Hurricane or Fairey Swordfish, e.g.). The instructors had experience in actual operations, and often were posted to OTUs after their operational tour. No. 1 Bagotville, Quebec (Hurricane) No. 3 Patricia Bay, British Columbia (Canso, Catalina) No. 5 Boundary Bay, British Columbia and Abbotsford, British Columbia (Consolidated B-24 Liberator, North American Mitchell) No. 31 Debert, Nova Scotia redesignated No. 7 OTU (Lockheed Hudson, de Havilland Mosquito, Anson) No. 32 Patricia Bay, British Columbia moved to Comox, British Columbia and redesignated No. 6 OTU and moved to Greenwood, Nova Scotia (Bristol Beaufort, Handley Page Hampden, Swordfish, Anson) No. 34 Pennfield Ridge, New Brunswick (Ventura) No. 36 Greenwood, Nova Scotia redesignated No. 8 OTU (Hudson, Mosquito) Central Flying School The Central Flying School was located at Trenton, Ontario. Central Navigation School The Central Navigation School was located at Rivers, Manitoba (Anson). Instrument Navigation School The Instrument Navigation School was located near Deseronto, Ontario. Flying Instructor Schools No. 1 Trenton, Ontario No. 2 Vulcan, Alberta, moved to Pearce, Alberta No. 3 Arnprior, Ontario Relief landing fields Every principal airfield (e.g. EFTS or SFTS) had one or two relief airfields located within 10–15 km. The No. 1 Relief Airfield is called "R1" in RCAF Station diaries. Some of the relief fields were paved, some were just grass, and some had hangars, barracks, and maintenance facilities. For example, trainees at No. 14 SFTS Aylmer moved to their R1 at Yarmouth Centre for the last four weeks of their course (radio, bombing, and gunnery). Airdrie, Alberta – R1 for No. 3 SFTS Calgary Alliston, Ontario – R2 for No. 1 SFTS Camp Borden Blackfalds, Alberta – R2 for No. 36 SFTS Penhold Boharm, Saskatchewan – R1 for No. 33 EFTS Caron Brada, Saskatchewan – R2 for No. 15 EFTS Regina Brora, Saskatchewan