At the 1935 Milan Exhibition there appeared the prototype of the Caproni Bergamaschi Ca 306 Borea (north wind), a six-passenger low-wing transport with fixed main landing gear faired into the nacelles which housed 185-hp (138-kW) Walter Major engines. Six of these aircraft served ultimately with the Italian airline Ala Littoria, and two more were supplied to the Italian colonial government in Libya Although built only in small numbers, the Borea was important as the progenitor of a range of light twinengine aircraft manufactured for a wide variety of roles. The first of these was the aptly-named Ca 309 Ghibli (desert wind), 78 of which were built between the 1936 and 1938 for use in Libya.
Production included two civil examples, 165 built for the Regia Aeronautica between 1940 and 1944, and two supplied to Paraguay in 1938. The military versions were used as light transports or reconnaissance bombers with a lengthened glazed nose, bomb racks, cameras, and with armament comprising three 7.7-mm (0.303-in) machine-guns. Another model featured a fixed forward firing 20-mm cannon. Seven squadrons equipped with Ghiblis were operational when Italy entered the war in 1940.
* Crew: 3
* Length: 12.85 m (42.16 ft)
* Wingspan: 16.20 m (53.15 ft)
* Height: 3.04 m (9.98 ft)
* Wing area: 38.70 m² (416.6 ft²)
* Empty weight: 1,960 kg (4,190 lb)
* Loaded weight: 2,930 kg (6,460 lb)
* Powerplant: 2× Alfa Romeo 115-II 6-cylinder inline engine, 390 hp (291 kw) each
* Maximum speed: 250 km/h (155 mph)
* Range: 1,050 km (652 mi)
* Service ceiling: 4,250 m (14,000 ft)
* Guns: 3 × 7.7 mm (.303 in) Breda SAFAT machine guns
* Bombs: up to 330 kg