Eddieddi wrote:and no ship with Launch also has stealth. so it shouldn't be an issue
I know the Manticore/Banshee is bad but to deny it´s existence is a bit harsh isn´t it?
Eddieddi wrote:A ship on silent running CANNOT launch.
Generally correct however in the above case, Stealth circumvents this as per FAQ see "Launch assets and Ground assets" second question/answer.
In regard to the original question that one is a bit unclear, however do not forget the full cloak which prevents spikes. So only when the cloak is down due to damage and the ship is in silent running and fires would such an issue arise, if that happens though your guess is as good as mine what is supposed to happen.
I would say there are two likely solutions: 1. The ship is kicked out of silent running that is it.
2. The ship is out of silent running and gains a spike.
Number 2 would appear to be the solution closest to the rules. While 1 would try to emulate the active scanning mechanics for this case.