About damaging components

[AMF]

Here's a strange question that I wasn't sure what thread to post it in, so this one seemed closer than any...:

You know in the empire wide build queue window, how you can choose to show "planets" "Ship SY" and "Planet SY"? Well, at the top of that list you can also choose just plain old "Ships" - but I have never figured out under what situations you might need that. Are there ship components that can build things that aren't spaceyards?

I feel stupid asking but...what the heck is that button for? Anybody use it?

Thanks,

Alarik