The Savoia-Marchetti S.56 was an Italian single-engine biplane flying boat trainer and tourer, built by Savoia-Marchetti.Of unequal span, the upper longer than the lower, of wooden construction. Instructor and student sat side by side in separate cockpits, with dual controls; a third cockpit was located just aft that. It used a 52 kW (70 hp) Anzani.The S.56A had a slightly longer span and 60 kW (80 hp) Anzani, and turned into amphibians by addition of manually retractable landing gear.