Designed for that all-embracing role "Army Co-Operation", the Armstrong Whitworth "Atlas" was a two-seat biplane first acquired by the RCAF in 1927. Its excellent low-flying characteristics, as displayed when utilized in message dropping and snatching, made it a first class ground attack aeroplane.

In November of 1934, after financial restrictions imposed by the depression had been eased, orders were placed for more reconditioned Atlases from the RAF. These were the first 'new' aircraft which the RCAF had obtained since January of 1931.

On the eve of World War II, there were sixteen Atlases on strength of the RCAF. Reconnaissance patrols were carried out over the Bay of Fundy until the end of October, 1939, when the aircraft were turned over to No. 118 (Coast Artillery Co-Operation) Squadron. The Atlas was finally replaced by the Westland Lysander.