Model faces are missing when placed in a scene

[gie005]

Hey there fellow Unity users,

So I have this model of a boat I want to use in my game, but whenever it is placed in the scene it looks like this:

Though in the preview window, it is displayed correctly:

Can anyone help me fix this problem ?
Thanks,
-gie005

[twiesner]

faces look flipped, in an 3d application import the model and turn on backface cull and flip the polys that are incorrect