Unnerving - Enemy Ships in your ZOC -25% Hit Points. Where do I see it?

Hello,

In the game I'm playing, I play with the Malevolent ideology. I have unlock the Unnerving trait (Enemy Ships in your ZOC -25% Hit Points).

But, when I look at the ship, I don't see there HP droping when they enter my ZOC.

Ok, I may miss something, but how can I know that the trait is really working?

Thank you.

P.S.: Please excuse my English, I'm not a native speaker.