The Fleet Model 60K Fort was the only aircraft designed and built by Canadians during the Second World War and was also the first all-metal monoplane built by Fleet Aircraft of Canada (Fort Erie). It was intended to be an intermediate trainer employed for pilot training between the de Havilland Tiger Moth primary trainer and the North American Harvard advanced trainer. Although it served with the British Commonwealth Air Training Plan, the Fort was redundant and was used to train wireless (radio) operators and had a relatively short operational career.