Habitat types: seaplanes and amphibious planes, and seaplanes are divided into airships and buoy planes. For example, 1976 China Shui Bo 5, which made its maiden flight, can only take off and land on the water and then climb back to the shore like a crocodile. Its successor, Jiaolong -600, finally went offline in 20 16, and it was an amphibious aircraft.
Structural types: hull type and pontoon type.
Scale type: small one or two engines, large four engines.
Engine types: concealed and abduction.