How to get I Spy achievement...

[tickedon]

I Spy
Activate reconnaissance system.


Could someone please tell me what you need to do to get this achievement?

I have over 80% of the achievements, but, it's not clear what I need to do to get this one.

Many thanks!

[Mondak]

It is on one of the first three maps or so. Just play the rounds out and you will get it.

[tickedon]

Ah thanks... got it after re-playing the first and second map. Something to do with having the bar at the top turned on. :D