Thanks Franysan. Can I be a pain and ask why the dial is the trigger? I can't get that from the 'Decloaking' reference card. I'm reading the trigger as being the spending of the 'cloaked' token. I'm blaming Farlander for this with his ability to use a stress token to convert any 'eyeballs' into hits.
Even if spending the token is the trigger, there's no opportunity to do it. You don't assign a dial to an ionized ship, so there really never is an timing window to spend the token. It's kind of like saying "when you're ionized, skip your "(immediately before you) reveal your dial" phase. Same goes for Advanced Sensors, which I think is in the FAQ.