Reading that card, my understanding is that you must meet the criteria of being in the fire arc of the enemy. If you are, you may choose to get a target lock or not. You will perform the boost action regardless of whether you get a TL or not, but you must have met the criteria for being in the enemy's arc to get the boost action.
Regardless, I think we have plenty of time for FFG to update the FaQ regarding this card's use before we actually have it in our hands.