This is a 3D model replica of a type IX U-boat submarine. On the submarine, the hatches, the rudders, the torpedoes, the propellers, the elevation fins, and all the guns are prepped and are ready for animation. In effect, everything is already set for you to just start animating. This is a 3D printable model and it is also animatable.
This is a zipped file that contains several file formats for this model.
Format 1 is .stl which is 3d printable.
Format 2 is .obj which also is 3d printable.
Format 3 is .fbx which is used for display and animation purposes and is set up for Arnold in Maya.
Format 4 is the Maya file.
This file is a zip. To access the 3d model, extract the folder containing the models, then open the folder.