Air Observation Post Squadrons Royal Air Force

Air Observation Post Squadrons although belonging to the RAF, were manned mostly by the RA. The pilots were all artillerymen as were most of the ground crews. The RAF supplied the technical ground staff and were responsible for the repair and maintenance of the aircraft. The aircraft used throughout was the Auster in various marks although other aircraft were sometimes used.

651 Air Observation Post Squadron RAF
652 Air Observation Post Squadron RAF
653 Air Observation Post Squadron RAF
654 Air Observation Post Squadron RAF
655 Air Observation Post Squadron RAF
656 Air Observation Post Squadron RAF
657 Air Observation Post Squadron RAF
658 Air Observation Post Squadron RAF
659 Air Observation Post Squadron RAF
660 Air Observation Post Squadron RAF
661 Air Observation Post Squadron RAF
662 Air Observation Post Squadron RAF
663 (Polish) Air Observation Post Squadron RAF
664 (Canadian) Air Observation Post Squadron RCAF
665 (Canadian) Air Observation Post Squadron RCAF
666 (Canadian) Air Observation Post Squadron RCAF