Based on the earlier Caudron C.280 the Frégate was a high-wing braced monoplane with an enclosed cabin for the pilot with two side-by-seats behind for passengers. Powered by a front-mounted 140 hp (104 kW) Renault 4Pei inline piston engine it had a tailwheel landing gear. The company built 27 Frégates, in 1939, 20 were requisitioned into service with the French Air Force for liaison work.