Re: Lineac 4 is tiny at a mere 90 metres long
So, could possibly be mounted in the axis of a naval vessel, the sort with the power already in place for rail guns?
Possibly (though I imagine operations consumes quite a bit of power) but why would you want to do that? Hard to imagine a less effective weapon than a few dozen protons, even if they *are* travelling at relativistic speeds. You wouldn't want to stick your head in the way, but it's not going to be any use as a weapon.