Heinkel HE 10

The Heinkel HE 10 was a trainer floatplane developed by the German aeronautical company Heinkel Flugzeugwerke in the late 1920s.
Development.
The Heinkel HE 10 was a monoplane trainer seaplane based on the HE 6. 
On September 4, 1929, an HE 10 flying near Warnemünde could not reduce its speed and crashed into the dam. The two pilots were seriously injured while the three passengers managed to land alone.