The Ikarus ŠM (Serbian Cyrillic:Икарус ШМ), ŠM (for Školski Mornarički en:School Navy) was the first design of Eng. for the Yugoslav company Ikarus, it was a side-by-side two-seat biplane flying boat powered by a 100 hp (75 kW) Mercedes engine. The aircraft used for training by the Yugoslav Royal Navy.