In theory ships can run out of DC.
If my memory is correct it is something like 20 DC per rack,
K-Gun,etc. So if you a have ship with 4 racks then that's 80. :hmm:
Given that each attack run will usually result in 3-6 DC, that is a lot of attacks; multiply it by the number of ships......
Now you see why I said in theory.
Hope it helps