Tau vehicle secondary weapons.

[The Man They Call Jayne]

It does say that, but it also says that Markerlight counters only last until the end of the phase. So how can you overwatch with them?

Unless it's "Target Acquired -> Pinpoint -> Unit gaining Pinpoint has BS boosted by X untill the end of the turn."?

[InsaneTD]

Nothing I've seen says you can't overwatch with markers.

[The Man They Call Jayne]

Permissive system. "Doesn't say I can't" =/= "I can".

Markers are fired in the shooting phase. Overwatch is done in the assault phase. And the ability is under the "Pinpoint" markerlight ability, not under the markerlight itself.

[Pottsey]

Wow that's nice, now I understand why they removed target arrays and muti trackers for fast tanks.

[KCKitsune]

Except that means you have to have a lot more markerlights.  I just wish they kept the damn multi-tracker.