The Heinkel HE 12 was a pontoon-equipped mail plane built in Germany in 1929 designed to be launched by catapult from a liner at sea. The concept was hit upon after Norddeutsche Lloyd (NDL) had carried a Junkers F 13 seaplane aboard the Lutzow during 1927 to provide joyrides for passengers when the liner was in port.
Made by Heinkel.