4 AOS- Air Observer School (RCAF)

Air Observers were later called "navigators". For recruits in this stream, the training path after ITS was 8 weeks at an Air Observer School (AOS), 1 month at a Bombing & Gunnery School, and finally 1 month at a Navigation School. The Air Observer schools were operated by civilians under contract to the RCAF. For example, Nos. 7, 8, and 9 were run by CP Airlines. However, the instructors were RCAF. The basic navigation techniques throughout the war years were dead reckoning and visual pilotage, and the tools were the aeronautical chart, magnetic compass, watch, trip log, pencil, Douglas protractor, and Dalton Navigational Computer. They trained in the Avro Anson.
NO4 AOS London 1942

The School was established at London, Ontario. The former school is now the London, Ontario International Airport.

More information on the RCAF Station at London can be found at

Royal Canadian Air Force RCAF.Info - RCAF Station London ON

YouTube YouTube - Teamwork Unlimited 1944

Project 44 BCATP

unvetted Source Project 44 BCATP

YouTube YouTube - Valour Canada Aerodrome of Democracy


Unit Accident Records: 4 AOS 4 Air Observer School RCAF (72)


Unit Casualtues: 4 AOS 4 Air Observer School RCAF (10)

1941-September-02
Killed in Flying Accident
Anson Mk. I 6141
1942-August-04
Killed in Flying Accident
Anson Mk. I 6839
1942-November-03
Killed in Flying Accident
Anson Mk. I 6341
Toronto, Ontario
1942-November-03
Killed in Flying Accident
Anson Mk. I 6341
Whitevale, Ontario
1942-November-03
Killed in Flying Accident
Anson Mk. I 6341
Guelph, Ontario
1943-May-14
Killed in Flying Accident
Anson Mk. I 7064
Smiths Falls, Ontario
1943-May-14
Killed in Flying Accident
Anson Mk. I 7064
Mosherville, Hants County, Nova Scotia, Canada
1943-May-14
Killed in Flying Accident
Anson Mk. I 7064
Theodore, Saskatchewan