Nos. 1 & 2 Air Navigation Schools offered four-week courses in astronavigation and were the last step for Air Observers.
The RAF schools, Nos. 31, 32, and 33, provided the same training as Air Observer Schools.
RCAF.info - RCAF Station Trenton ON
NO1 ANS moved to Rivers Manitoba 23 November 1940
RCAF.info - RCAF Station Rivers MB
NO 1 ANS was redesignated Central Navigation School after an amalgamation with NO 2 ANS from Pennfield Ridge, NB May 11 1942