Minimalistic ship designs

In thinking about how to visually depict ships and other vehicles in the core rules, I am leaning towards the minimalist shadow forms like I used in the Army Ants rules. Here are some samples I worked up really quick... the first few are too small in terms of file size (I'll have to re-do those), but the last two are probably big enough files that they look good when reduced. The first few are too small and you can see the pixels, but the last two are about the right size.