It would (from my understanding of it) lose all electrical systems and cease to function. Damage itself would most likely depend on whether it was in mid flight or stationary, as ionic damage doesn't do "physical" damage. (Or at least as far as I understand it.)
And this could easily change in the 75 years it's going to take to get to SOON.
Mozinwrath, it HAS no ionic damage. Probably because it's considered to be too technologically primitive to have electrical system to be damaged - at a guess. Either that or the whole thing is an oversight.
It would stand to reason that a vessel without an ionic capacity would be invulnerable to ionic attack. Of course, logic does not always apply around here.
"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."