If you try to restore a mothballed ship, you will get 0% CR after you toggled the mothball stat.
One more thing: where is the "outer reach" of a star system, I could not find a certain prob in a star system. <- Found it, it's three stars system, took me a while.
And I have one mission could not finish at all the prob is not even there. I have modified the sensor range to 50k and still unable to find anything in the system. Is it because 2 missions share the same prob and I destroyed the prob after complete the 1st mission?