Fire on ship problem(?)

[President_Elect_Shang]

How do you fire on and destroy a ship that has 0 movement points? I have ordered a ship that had all its engines knocked out to be fired on and destroyed. There are other ships (4) of the same empire in the same sector that have movement points and no orders set. So why is it that the single ship without movement hasn’t been blown to bits by the other ships?

Also what’s the difference between core, escort and crap in the fleet window? I understand how they are different in the real world and in various games that use these concepts but there doesn’t appear to be any difference in the way the game operates.