Repeating detections

[FERdeBOER]

Hello all.
Is possible to make only one trigger that repeats everytime that happens?

I´m trying to make a training mission and I would like to tell the player (in a sub) that he has been detectec.

i.e. the player goes in his sub(say an Akula), and there is another sub (a Han). The Han detects the Akula, the Akula breaks the contact, but time after the Han detects again the Akula.
Is possible to make a trigger that tells the player averytime the Han regains the contact?

Thank you very much for your help.